What is OPS in Baseball?

What is OPS?

OPS, an acronym for On-base Plus Slugging, is a fundamental statistic in baseball that combines two essential offensive components: on-base percentage (OBP) and slugging percentage (SLG). OBP measures a player's ability to reach base successfully, while SLG gauges a player's power and extra-base hit production. By merging these two metrics, OPS provides a holistic view of a player's offensive prowess.

The formula for calculating OPS is: OPS = OBP + SLG

  • On-Base Percentage (OBP): This measures how often a player successfully reaches base, including hits, walks, and hit by pitches. A higher OBP indicates a player is good at getting on base and extending their team's opportunities to score.

  • Slugging Percentage (SLG): This measures a player's power hitting by considering the number of bases they accumulate from hits. Extra-base hits like doubles and home runs contribute more to the SLG. A higher SLG suggests a player has good power and can drive the ball effectively.


An OPS of .900 is considered excellent, indicating a high level of offensive productivity.

Understanding the significance of OPS in evaluating player performance is crucial for any baseball enthusiast. OPS transcends the limitations of traditional statistics like batting average or home runs by encompassing both the ability to get on base and the power to produce extra-base hits. By examining OPS, analysts and fans gain a more comprehensive understanding of a player's offensive contributions and their impact on the game.

OPS emerged as a statistical tool to assess player performance, gaining prominence over time. Coaches, scouts, and front offices have increasingly recognized the value of OPS in identifying talented players and making informed decisions. By examining OPS trends throughout baseball history, we can gain insights into the evolution of the game and the players who left a significant mark.

Players With Good OPS:

Shohei Ohtani - 1.073

Mookie Betts - 1.009

Freddie Freeman - .995

Ronald Acuna - .988

Matt Olsen - .970

Yandy Diaz - .910

Breaking Down the Components of OPS

To fully grasp the concept of OPS, it is crucial to understand its individual components: on-base percentage (OBP) and slugging percentage (SLG). These two metrics play a pivotal role in evaluating a player's offensive performance and contribute to the overall OPS calculation.


On-base Percentage (OBP)

On-base percentage (OBP) measures a player's ability to reach base successfully. It takes into account not only hits but also walks, hit-by-pitches, and reaching base due to errors. Calculating OBP involves dividing the total number of times a player reaches base (hits, walks, hit-by-pitches) by their total plate appearances. This metric provides insights into a player's discipline, selectivity, and overall effectiveness at the plate.

Factors such as a player's batting eye, knowledge of the strike zone, and ability to draw walks all influence their OBP. A high OBP indicates that a player consistently finds ways to reach base, providing opportunities for their team to score runs. Players like Joey Votto and Mike Trout have established themselves as OBP powerhouses, consistently maintaining impressive on-base percentages throughout their careers.


Slugging Percentage (SLG)

Slugging percentage (SLG) measures a player's power and ability to produce extra-base hits. It takes into account the total bases a player accumulates from their hits and divides it by their total at-bats. SLG gives weight to extra-base hits, with doubles, triples, and home runs contributing more to the calculation than singles.

A player's SLG is influenced by their ability to hit for power, drive the ball into the gaps, and clear the fences. It provides a measure of a player's ability to hit for extra bases, helping their team generate runs. Players like Barry Bonds and Babe Ruth are renowned for their exceptional slugging abilities and consistently high SLG numbers.

Relationship between OBP and SLG

Understanding the relationship between on-base percentage (OBP) and slugging percentage (SLG) is key to comprehending OPS. Both OBP and SLG contribute equally to the calculation of OPS, highlighting the importance of balancing these two components.

While some players excel in OBP but may have a relatively lower SLG, others may have a high SLG but a lower OBP. The ideal scenario is to have a player who excels in both categories, as this translates to a higher OPS. However, identifying players with different strengths in OBP and SLG can help assess their specific contributions to the team's offensive success.

For instance, a player with a high OBP but a lower SLG might be valuable as a leadoff hitter, consistently getting on base and setting the table for the power hitters behind them. On the other hand, a player with a high SLG but a lower OBP might be better suited for a middle-of-the-lineup role, as they have the ability to drive in runs with their power hitting.

By understanding the relationship between OBP and SLG, analysts and fans can gain valuable insights into a player's offensive profile and contributions to their team's success. OPS serves as the bridge that merges these two components, providing a comprehensive assessment of a player's overall offensive prowess.

In the next section, we will explore the historical analysis of OPS, delving into its evolution as a widely used metric and comparing it to traditional statistics. Stay tuned to uncover the significance of OPS throughout baseball history and its impact on player evaluation and contract negotiations.

Historical Analysis of OPS

OPS has evolved as a widely used metric in baseball over time, gaining recognition for its ability to provide a more comprehensive assessment of player performance compared to traditional statistics. Let's delve into the historical analysis of OPS and explore its impact on the game.

Evolution of OPS as a Widely Used Metric

While batting average and home runs have traditionally been the primary statistical measures of offensive success, OPS has emerged as a more inclusive metric. The increased availability of data and advanced analytics in recent decades has played a significant role in the widespread adoption of OPS as a valuable tool for player evaluation.

Coaches, scouts, and front offices now acknowledge the limitations of traditional statistics and recognize the importance of a more nuanced evaluation of players' offensive contributions. OPS, with its combination of on-base percentage and slugging percentage, offers a more complete picture of a player's offensive abilities, leading to its widespread acceptance and usage in the baseball community.

Comparing OPS to Traditional Statistics

OPS provides a comprehensive view of a player's offensive performance, taking into account both their ability to get on base and their power production. This contrasts with traditional statistics like batting average, which only consider hits relative to at-bats, and home runs, which focus solely on power hitting.

By incorporating both OBP and SLG, OPS offers a more holistic assessment of a player's offensive capabilities. It captures a player's ability to reach base through various means, such as hits and walks, while also measuring their power and extra-base hit production.

Notable Players with Impressive Career OPS

When examining the historical impact of OPS, numerous players stand out for their exceptional career performances in this metric. Hall of Famers such as Babe Ruth, Ted Williams, and Lou Gehrig boast some of the highest OPS figures in baseball history, reflecting their remarkable offensive prowess.

These players not only excelled in traditional statistics but also consistently demonstrated high on-base percentages and slugging percentages. Their ability to reach base frequently and generate significant power numbers contributed to their elevated OPS and solidified their legacies as offensive juggernauts.

Impact of Park Factors on OPS

While OPS provides a valuable measure of a player's offensive performance, it's essential to consider the influence of park factors. Different ballparks have varying dimensions and playing conditions, which can affect a player's ability to accumulate hits, produce extra-base hits, and draw walks.

Some ballparks are more favorable for hitters, offering shorter distances to fences or thinner air that boosts the flight of the ball. Conversely, other ballparks are known to be more pitcher-friendly, featuring spacious outfields or heavier air that hampers power hitting.

When analyzing OPS, accounting for park factors allows for a fair comparison of players across different environments. Adjusting OPS figures to reflect the specific park factors helps provide a more accurate evaluation of a player's performance relative to their peers.

In the next section, we will explore OPS+, a metric that adjusts OPS for park factors and league average, enabling comparisons between players from different eras. Discover how OPS+ enhances our understanding of players' offensive capabilities and their historical significance.

OPS+: Adjusting OPS for Park Factors and League Average

OPS+ is a valuable metric that adjusts OPS to account for park factors and the league average. This adjustment allows for fair comparisons between players from different eras and provides a deeper understanding of their offensive capabilities. Let's delve into OPS+ and its significance in evaluating player performance.

Explanation of OPS+ as a Normalized Metric

OPS+ is a normalized metric that compares a player's OPS to the league average OPS, taking into consideration the park factors of their home ballpark. The league average OPS is set at 100, and each point above or below 100 represents a percentage point above or below the league average.

For example, a player with an OPS+ of 120 is 20% above the league average, indicating an exceptional offensive performance relative to their peers. Conversely, a player with an OPS+ of 80 is 20% below the league average, suggesting a below-average offensive output.

By normalizing OPS, OPS+ provides a more precise evaluation of a player's offensive prowess, regardless of the era in which they played or the park factors they encountered.

Calculation and Interpretation of OPS+

OPS+ is calculated by taking a player's OPS, dividing it by the league average OPS, and multiplying the result by 100. The final figure represents the player's OPS+.

Interpreting OPS+ is relatively straightforward. A value above 100 indicates that a player performed better than the league average, while a value below 100 signifies below-average performance. The higher the OPS+, the more exceptional the offensive output, and vice versa.

OPS+ allows analysts and fans to compare players from different eras on a level playing field. It helps contextualize a player's performance by factoring in the offensive environment they played in, providing a fairer assessment of their skills and contributions.


Identifying Players Who Excel in Different Eras

One of the most significant advantages of OPS+ is its ability to identify players who excelled in different eras. By adjusting OPS for park factors and league average, OPS+ enables comparisons between players from the dead-ball era, the lively ball era, and the modern era.

OPS+ allows us to appreciate players who performed exceptionally well during periods when offensive statistics were generally lower or higher. It helps us recognize the achievements of players like Ty Cobb, who thrived in an era dominated by small ball, as well as players like Barry Bonds, who produced remarkable numbers during the power-hitting era.

OPS+ provides a valuable tool for historical analysis, allowing us to understand the true impact and significance of players' offensive performances throughout baseball history.

In the next section, we will explore how OPS has been integrated into advanced analytics and its correlation with team success. Stay tuned to discover the modern applications of OPS and its implications for player evaluation and team strategies.

OPS and Modern Analytics

OPS has become an integral part of advanced analytics in baseball, contributing to a deeper understanding of player performance and its impact on team success. Let's explore how OPS is integrated into modern analytics and its correlation with team performance.

Integration of OPS in Advanced Analytics

As the game of baseball evolves, the role of advanced analytics becomes increasingly important. OPS has found its place in these analytical frameworks, offering valuable insights into player performance beyond traditional statistics.

Advanced metrics like WAR (Wins Above Replacement) incorporate OPS as a component to assess a player's overall value. OPS helps analysts gauge offensive contributions, providing a solid foundation for evaluating a player's impact on scoring runs and generating wins for their team.

Correlation between OPS and Team Success

Numerous studies and analyses have revealed a strong correlation between a team's OPS and its success on the field. Teams with higher OPS tend to score more runs and win a greater number of games.

By analyzing team-level OPS figures, front offices can identify offensive strengths and weaknesses and make strategic decisions regarding player acquisitions, lineup construction, and in-game tactics. OPS serves as a valuable tool in assessing a team's offensive capabilities and guiding their overall approach to the game.

OPS in Player Contract Negotiations

OPS has also influenced player contract negotiations, as teams recognize its significance in evaluating offensive performance. Players with higher OPS figures often command higher salaries and longer-term contracts due to their demonstrated ability to contribute offensively.

OPS provides a quantifiable measure of a player's value at the plate, allowing teams to assess the potential return on their investment. Front offices consider a player's OPS, along with other advanced metrics, when determining contract offers, salary arbitration cases, and free agent signings.

In summary, OPS has found a firm foothold in modern analytics, serving as a crucial component in assessing player value, determining team success, and guiding strategic decision-making in player contract negotiations.

Limitations and Criticisms of OPS

While OPS is a valuable metric for evaluating offensive performance, it is important to acknowledge its limitations and consider alternative metrics for a more comprehensive assessment. Let's explore some of the criticisms and limitations associated with OPS.

Factors That OPS Does Not Account For

OPS focuses primarily on a player's ability to get on base and hit for power, but it does not consider other offensive factors such as baserunning, situational hitting, or the ability to advance runners. These aspects of the game can significantly impact a player's overall offensive contribution and may not be fully captured by OPS alone.

Alternative Metrics for Player Evaluation

In recent years, baseball analysts have developed alternative metrics that aim to provide a more comprehensive evaluation of offensive performance. Metrics like wOBA (Weighted On-Base Average) and wRC+ (Weighted Runs Created Plus) take into account additional factors, such as the value of different offensive outcomes and league context, offering a more nuanced assessment of a player's offensive contributions.

Arguments Against the Significance of OPS

Some critics argue that OPS places too much emphasis on slugging percentage and may overvalue power hitters. They contend that OBP, which rewards plate discipline and the ability to reach base, should be weighted more heavily in the evaluation of offensive performance.

While these criticisms and alternatives are worth considering, OPS remains a widely accepted and useful metric for assessing offensive performance. Its simplicity and comprehensiveness make it accessible and valuable for both casual fans and advanced analysts.

Practical Applications of OPS for Fans

For fans, OPS can enhance the enjoyment and appreciation of the game in various ways. Let's explore some practical applications of OPS for baseball enthusiasts.

Fantasy Baseball and OPS

In fantasy baseball leagues, OPS is often utilized as a scoring category or a basis for player evaluation. Understanding OPS can help fantasy managers identify players who excel in both OBP and SLG, providing a well-rounded offensive contribution to their fantasy teams.

Identifying Undervalued Players Using OPS

OPS can help fans identify undervalued players whose overall offensive contributions may be overlooked by traditional statistics. By analyzing OPS figures, fans can gain insights into players who possess a combination of on-base skills and power but may not receive as much recognition or attention.

Using OPS to Appreciate Players' Contributions

By incorporating OPS into our understanding of player performance, we can better appreciate the offensive contributions of players and their impact on the game. OPS allows us to recognize and celebrate players who excel in different aspects of offensive production, showcasing the diverse skills and strategies within the sport.

OPS, or On-base Plus Slugging, is a vital metric in baseball that combines on-base percentage (OBP) and slugging percentage (SLG) to provide a comprehensive assessment of offensive performance. Understanding OPS allows fans to gain insights into player contributions, evaluate team success, and appreciate the historical significance of offensive achievements.

While OPS has its limitations, it remains a widely used and valuable metric in baseball analysis. Its integration into advanced analytics, correlation with team success, and practical applications for fans underscore its significance in the game.

By incorporating OPS into our baseball analysis, we can deepen our understanding of player performance, enhance our enjoyment of the sport, and appreciate the diverse skills that contribute to the rich tapestry of the game.