Is This Cubs Defense Historic, or Merely Good?

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Each game, the Cubs provide more evidence that they are a special defensive unit. One question has been on my mind for the past few weeks; just how special are they? Defense has always been the trickiest part of baseball to quantify, especially across historical eras, but there are a few different metrics out there that can put what the 2026 Cubs are doing on defense in context.

As a unit, the Cubs are on pace for 83 defensive runs saved (DRS), per Sports Info Solutions. Only 20 teams have reached that number over a full season since 2003, as far back as that stat goes. Historical defense, as we noted, is difficult to put in context and is changing regularly, so another way to look at the Cubs' defensive dominance is compared to their 2026 peers. The second-best team this season is the Atlanta Braves, on pace for 62 DRS. That gap of 21 runs between the two best teams has been topped once since 2013, by the 2022 Yankees (41!!).

Since 2016, Statcast has provided more in-depth defensive data. Outs Above Average (OAA), from Baseball Savant, encompasses that information. The 2026 Cubs are currently at 60 OAA as a team, on pace for 77 for the full season. The highest single-season OAA a team has recorded was the 2017 Minnesota Twins, at 66. In fact, the 2026 Cubs already have the second-highest OAA ever, and they still have 35 games to play.

To add the same historical context to OAA as we did to DRS, the Cardinals and the Diamondbacks are tied with 31 OAA right now, on pace for around 40 for this season. The difference between them and the Cubs, a whopping 37 runs, is shocking. Only 12 teams in the Statcast era have even put up 37 OAA in a single season; the 2025 Cubs finished with 36 OAA. The 2017 Minnesota Twins finished 34 OAA above the second place team that year; they are the only other team to finish the season more than 20 OAA above the competition.

Since 2018, Statcast has also given us Fielding Run Value (FRV). The highest team FRV ever recorded was the 2018 Diamondbacks, at 64 FRV. The 2026 Cubs are already at 62 and on pace to easily be #1 here as well. One of the other reasons the Cubs are outliers here is that 61 of the 62 runs saved come from the Cubs' infielders and outfielders, and only 1 from their catchers. The top 20 FRV teams are all buoyed by high catching runs; the Cubs have done it without elite framing.

Digging deeper, the IF/OF FRV of 61 is made up of 49 from their range and 11 from their arms. While the 11 runs from their arms ranked just outside the top 5, there is no doubt they will be there by the end of the season, potentially pushing the 2021 Red Sox (17 FRV) for the top spot. As for their range, they already stand alone, clear of the pack. Only the 2021 Cardinals (41 FRV) have put up a full season range FRV over 40, let alone 49.

The FRV gap between this year’s Cubs and the second-place Blue Jays (26 runs) is also significant, as teams are normally much closer together. Only the 2018 Diamondbacks finished more than 10 runs clear of the competition, and in 5 of the 7 years of FRV, the difference between first and second was 6 runs or fewer.

By any defensive measurements you like, the 2026 Cubs are putting up historic numbers. With contributions from every position, the defense on display every night is worth the price of admission. We can't satisfactorily compare them to the great defensive teams from much earlier eras, like the best of Earl Weaver's Orioles, but it's fair to say that over the last quarter-century, no team has been demonstrably better than the 2026 Cubs at turning balls in play into outs.

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Jeremy is from the NW Suburbs of Chicago and is a lifelong Cubs fan. He has worked in professional baseball for the Tampa Bay Rays and Seattle Mariners as well as MLB Office of the Commissioner in a variety of roles including coaching and scouting. More recently, Jeremy spent 6 years at Driveline Baseball primarily working on developing and coaching high school and youth athletes.