Defensive Runs Saved
Based on Wikipedia: Defensive Runs Saved
In 2017, Andrelton Simmons turned a routine ground ball into a statistical marvel that redefined the ceiling of defensive excellence. That single season, the shortstop notched a Defensive Runs Saved (DRS) figure of 41, a number so high it stands as the highest recorded in a single season through the end of the 2025 Major League Baseball season. To understand why this matters, one must first dismantle the century-old illusion that baseball defense is merely about not making errors. For generations, the public and the press relied on fielding percentage, a metric so blunt it could mistake a stationary statue for a gold-glove winner if he simply stood in place and waited for easy chances to come his way. Fielding percentage counts only the balls you get to; it ignores entirely the balls that fly past you because your range is too short.
DRS was invented to fix this blindness. Developed by Baseball Info Solutions, this statistic first appeared in Major League Baseball data sets in 2003 with a singular, revolutionary goal: to measure how many runs a player saved or cost his team relative to an average fielder at that same position. It is a metric of range, instinct, and the ability to turn potential hits into outs that others simply cannot reach. The math behind it is precise and unforgiving. Every batted ball in the game has an estimated probability of being converted into an out based on historical data regarding how often a player at that position makes the play given where the ball was hit, its trajectory, and its speed. If a center fielder fails to catch a fly ball that the average player is expected to catch 30 percent of the time, he does not simply get an error; in the DRS algorithm, he loses 0.3 points. Conversely, if he catches a ball that only has a 30 percent chance of being caught by the league average, he gains 0.7 points. These fractional values accumulate over the course of a season, are adjusted against league averages for defensive performance and run value, and result in a final number where positive is good and negative is dangerous.
The divergence between traditional metrics and this modern calculus is stark. Consider the period from 2003 to 2025. If you looked at the top ten shortstops ranked by fielding percentage over those two decades, you would see names associated with consistency and reliability. Yet, if you flipped the page to rank the same players by Defensive Runs Saved, the lists barely overlapped. Only three players—Andrelton Simmons, J.J. Hardy, and Trevor Story—managed to land on both rosters. This overlap is not a coincidence; it is evidence of a fundamental difference in what we are measuring. Fielding percentage rewards safety and opportunity management; DRS rewards athleticism, anticipation, and the sheer volume of plays made that should have been hits.
The historical implications of this shift are profound. Because DRS data only exists from 2003 onward, the defensive legends of previous eras remain unevaluated by this specific lens. We cannot calculate how many runs Brooks Robinson saved at third base or how many Ozzie Smith converted into outs with his acrobatic range in the 1980s using the DRS formula. They are ghosts in the machine, their brilliance acknowledged but not quantified by the modern algorithm. Baseball Reference acknowledges this gap by utilizing Total Zone Rating for seasons prior to 2003 when calculating Wins Above Replacement (WAR), a comprehensive metric that attempts to value a player's total contribution. However, even within the era of available data, there is nuance. Different statistical providers handle the raw data with slight variations. For his illustrious career, Baseball Reference credits Adrian Beltré with 205 Defensive Runs Saved, while FanGraphs lists him at 200. These discrepancies highlight that DRS is a model, not a physical law, but they do not diminish its power to illustrate the landscape of defensive play.
The extremes of this metric reveal the true volatility of fielding performance. While Simmons set the standard for the high end with his 41 runs saved in 2017, the bottom of the barrel tells an equally compelling story of defensive liability. The lowest single-season DRS recorded at any position through 2025 belongs to Matt Kemp, the center fielder who posted a staggering -33 in 2010. That number implies that Kemp, relative to his peers, cost his team more than three dozen runs over the course of a season simply by failing to make plays he was expected to make or by being positioned poorly when the ball was hit. Such a figure suggests that a single player's defensive limitations can effectively negate hundreds of offensive runs generated by his teammates. This is the gravity of defense: it is not just about preventing runs; it is about actively shaping the scoreline.
When we look at career longevity, the hierarchy shifts again but remains dominated by those who mastered range over time. Through the end of the 2025 season, Andrelton Simmons holds the title for the highest cumulative DRS in history with 201 runs saved. He edges out Adrian Beltré, the legendary third baseman, by a single run with 200. This near-tie between an infielder and a corner outfielder speaks to the universality of the metric; whether covering the dirt or the grass, the ability to cover ground translates directly into preventing runs. However, the career totals also expose the long-term cost of poor range. Derek Jeter, a shortstop with a legendary offensive resume and 14 World Series rings, finished his career with a DRS of -162. This does not mean he was a bad player; it means that over two decades, his defensive positioning and range were consistently below the league average for shortstops, costing his teams an immense number of runs relative to what they would have saved with an average or better defender at the position.
The integration of DRS into broader value metrics has changed how we view player worth. Baseball Reference uses Defensive Runs Saved as a core component of its Wins Above Replacement statistic, acknowledging that a player's contribution is not solely defined by batting average or home runs. For older seasons, they revert to Total Zone Rating, but the principle remains the same: defense matters, and it can be measured. Simmons' 2017 season, with its historic 41 DRS, ranks as the second-best all-time defensive season according to Baseball Reference's defensive WAR, trailing only Terry Turner's performance in 1906. The fact that a modern shortstop is being compared favorably to a player from the dead-ball era based on run prevention metrics underscores how data bridges the gap between generations.
Yet, the reliance on DRS also invites scrutiny regarding its limitations and the specific nature of the data sources. The statistic relies heavily on the categorization of every batted ball by human scorers at Baseball Info Solutions. These scouts watch video replays to determine where a ball was hit and how hard it was struck before assigning probabilities to potential plays. This human element introduces the possibility of inconsistency, though the volume of data across thousands of games tends to average out individual scorer biases. The variation between FanGraphs and Baseball Reference in career totals for players like Beltré suggests that even with standardized inputs, the algorithms used to convert those points into run values differ slightly. One organization might value a stop at shortstop differently than another when converting it to runs saved. Despite these minor fractures in the data, the overarching narrative remains consistent: the days of relying solely on fielding percentage are over.
The story of DRS is also the story of player development and roster construction. When teams began to prioritize range over error avoidance, the archetype of the "gold glove" changed. A player no longer needed to have a cannon arm if his positioning allowed him to turn 90-degree turns into easy throws rather than long chases requiring rocket arms. The metric forced coaches to rethink training regimens, emphasizing first-step quickness and lateral agility over the traditional focus on footwork for fielding grounders in place. This shift has rippled through the minor leagues, where young players are now evaluated not just on whether they can make a play when the ball is hit directly at them, but on how often they successfully converge on balls that would have been singles against an average defender.
The impact of these statistics extends beyond the box score into the realm of contract negotiations and public perception. A player like Derek Jeter with a -162 career DRS is still celebrated as one of the greatest shortstops ever, largely because his offensive production was so high that it masked the defensive deficit. However, in the modern analytical landscape, such a deficit is scrutinized heavily. If a team were to sign a replacement-level player who hits 30 home runs but has a -20 DRS, they must calculate whether those 30 homers are worth the 20 runs given up defensively. The math rarely works out in favor of negative defense unless the offensive spike is astronomical. This calculation forces front offices to confront the reality that a "good" fielder is often defined by how many extra outs he creates per season, not just how clean his error column looks.
Looking back at the comparison of shortstops from 2003 to 2025, the three players who appear on both the fielding percentage and DRS lists—Simmons, Hardy, and Story—represent a rare breed. They were athletes who combined elite range with the technical precision to convert those range plays into outs without committing errors. Their presence on both lists suggests that true defensive dominance is not an either/or proposition; it is a synthesis of speed, instincts, and execution. For the other seven players on each list, their exclusion from one or the other tells a story of specialization. Some were safe but static, making easy plays perfectly but lacking the range to save runs on balls hit into gaps. Others were dynamic, covering vast swaths of the field to make difficult stops, only to occasionally commit an error that cost them in the traditional metric.
The data also serves as a historical ledger for the evolution of the game itself. The lowest DRS ever recorded, Matt Kemp's -33 in 2010, stands as a benchmark for defensive struggles, but it is also a reminder of how much the game has changed since then. In recent years, defensive shifts and improved analytics have further compressed the margin for error. A fielder who cannot adjust to these new tactical landscapes sees his DRS plummet quickly. The metric acts as a real-time barometer of a player's adaptability. Simmons' ability to maintain elite status through 2017 and beyond into the cumulative leaderboards demonstrates not just talent, but an evolution in technique that kept him ahead of the curve.
The silence regarding pre-2003 players remains the most significant gap in this narrative. Without DRS, we are left with anecdotal evidence for giants like Ozzie Smith. We know he was great because he won Gold Gloves and moved crowds to their feet, but we do not have the specific number of runs he saved relative to an average shortstop in 1985. This forces a comparison that is inherently unfair between eras where equipment, playing conditions, and training methods were vastly different. DRS provides a level playing field for players from 2003 onward, allowing us to say with statistical certainty that Simmons' 2017 season was objectively the best defensive performance in the modern era. It removes the fog of nostalgia and replaces it with cold, hard data.
As we move deeper into the 2026 season, the conversation around player value will increasingly hinge on these defensive nuances. The MVP debate, often dominated by home run leaders and batting averages, is slowly being reshaped by the recognition that a team cannot win without defense. A two-way ledger for the MVP might now look different: it would weigh not just how many runs a player scores, but how many he prevents from scoring through his glove work. The story of Defensive Runs Saved is ultimately the story of baseball's maturation as a sport of data. It acknowledges that the game is played in the gaps between the bases and in the air above the field, and that every single play has a value that can be measured, analyzed, and understood.
The numbers tell a story of human limitation and extraordinary capability. From the -162 runs cost by Jeter to the +41 runs saved by Simmons, the range of performance is vast. It reminds us that in baseball, as in life, what you don't do can be just as costly as what you fail to do. A player standing still while a ball rolls past him costs his team runs; a player sprinting to make an impossible catch gains them. DRS captures this dynamic tension, transforming the silent art of fielding into a quantifiable science that has forever altered our understanding of the game's heroes and villains. The legacy of Brooks Robinson may never be captured by DRS, but for every player who stepped onto the field in 2003 or later, their defensive footprint is now permanently etched in these numbers, telling a story of range, effort, and the relentless pursuit of the out.