Baseball has always been the respite for lefties who get a raw deal in real life. Scissors, power tools and spiral notebooks might conspire against them, but not the design of our beautiful game. Here, left-handed hitters have a headstart to first base, a visual advantage against the majority of pitchers and even that short porch at Yankee Stadium.
You’re welcome, lefties.
But rarely have lefties taken advantage of this advantage quite the way they are here in 2026. A southpaw surge has been one of the defining elements of the season.
It’s a trend of both quantity and quality. (Stats below are through Wednesday’s games.)
So, what’s going on here? Because this doesn’t feel … right (get it?).
“Baseball kind of goes in cycles,” said the Dodgers lefty-hitting third baseman Max Muncy. “For a long time, you had Miggy Cabrera, [Alex Rodriguez], [Albert] Pujols, a bunch of right-handed guys. I think it just goes in cycles, and I think that’s just the way life is. I don’t think there’s any rhyme or reason to it.”
Maybe it’s that simple.
It’s probably not that simple.
While it’s likely true that there’s a bit of a cyclical nature to stardom, there is cold, hard calculation when it comes to opportunities allotted by MLB teams.
Put another way, the sheer number of lefties qualifying for the batting title didn’t happen by accident.
If you look at the weighted on-base averages (wOBA) for each handedness matchup from 2025, you’ll see that the smallest population of batters performed the best against the largest population of pitchers.
Right-handed batter vs right-handed pitcher: .307
Left-handed batter vs. right-handed pitcher: .324
Right-handed batter vs. left-handed pitcher: .313
Left-handed batter vs. left-handed pitcher: .292
The .324 wOBA for lefty hitters vs. righty pitchers marked a five-point jump from a season earlier, while the .313 wOBA for righty batters vs. lefty pitchers was the lowest of the pitch tracking era (going back to 2008).
An environment that produces such numbers inevitably influences how teams dole out at-bats, which helps explain the unusually large number of lefty hitters qualifying for the batting title.
But why are these numbers being produced in the first place?
Here are a (left) handful of reasons why.
1. The breaking-ball breakout
For as much attention as fastball velocity gets in today’s game, the rise in use of the breaking ball has arguably had a bigger impact on outcomes.
This 2026 season marks the sixth consecutive year that the average fastball velocity has increased, but at the same time, fastball usage is declining. In the first year of the pitch-tracking era (2008), 59.4% of pitches were fastballs (four-seamers or sinkers). Eighteen years later, that’s down to 47.2% in 2026.
Meanwhile, the data boom and ball-tracking technology that enhances our understanding of seam-tracking has made spin all the rage. Breaking ball usage has gone from 23.5% at the start of the pitch-tracking era to 30.3% this season. (It reached as high as 31.1% in 2023).
The slider group (sliders, sweepers and slurves) makes the biggest contribution to this breaking-ball breakout. Usage of pitches in the slider category has gone from 14.4% in 2008 to 22.2% this season, with a peak of 22.6% in each of the two previous seasons.
In the pitch-tracking era, lefties have a .275 wOBA against slider-group pitches (coming from either hand), while righties have a .269 mark. But over the last four years combined, the difference is more drastic: a .292 mark for lefties vs. a .278 mark for righties.
“[As a lefty], the slider kind of comes to you,” said Phillies interim manager Don Mattingly, himself a pretty decent lefty hitter back in the day. “Unless they’re able to catch it back door, but it still comes to you.”
Use of the sweeper, specifically, is at an all-time high this year, at 8.4% of all pitches thrown. (The pitch was not used at all until 2012.) Lefties have a .288 wOBA against the pitch this year, while righties have a .271 mark. And the difference is drastic when the sweeper is thrown by a right-handed pitcher — a .316 mark for lefty hitters vs. a .257 mark for righties.
2. The elimination of the extreme infield shift
Left-handed groundballs to the pull side have generated a .184 batting average this season – 37 points higher than in 2022 (.147). Since the rule change, those ground balls haven’t produced an average lower than .179.
3. Righty starters have more variety
We polled a number of players on this topic at the All-Star festivities, and lefty-hitting Diamondbacks dynamo Corbin Carroll offered one explanation we had not considered.
“I feel like righties have been throwing more pitches than ever,” Carroll said. “So that makes the right-on-right game-planning even harder when having to think about six to seven different pitches.”
The difference is slight, but Carroll is right. Among those with at least 1,000 pitches thrown this season, righties have an average of 5.73 pitch types, while lefties have an average of 5.35.
So while not a major difference, that is one more thing that lefties have working in their favor in today’s game.
Almost 4,000 ball/strike calls have been overturned in the first year of the ABS Challenge System. But the system also impacts tons of calls that aren’t challenged, because it has forced umpires to adjust to a zone that is lower and smaller.
Every MLB catcher throws right-handed (maybe someday we’ll have another lefty catcher, but not today), and that means it is easier for them to manipulate calls with their framing on the glove side, off the outside edge of the zone for left-handed hitters.
This happens most frequently down and away, labeled as Zone 13 here.
In the pitch-tracking era, we have seen as high as 2.7% of all pitches thrown to left-handed batters be called for strikes in Zone 13, even though they are balls. (That was in 2010.) This year, only 0.4% of all pitches to lefties have been called strikes in Zone 13. This is actually down only slightly from last season’s 0.5%, prior to the introduction of ABS. But umpires prepared for the arrival of ABS in recent years by beginning to call a zone closer to the rulebook zone.
In terms of raw numbers, lefty hitters are on pace to deal with more than 6,500 fewer called strikes in that one area than they did in 2010. So they aren’t getting shortchanged nearly as often on pitches off the plate down and away, which they rarely do damage on, even if they do swing.
(The change is much less dramatic for right-handed batters on pitches in Zone 14, off their low-outside corner. Called strikes in that area have fallen from a pitch-tracking era high of 1.5% of all pitches to righties, in 2017, to 0.6% this year.)
All of the above has contributed to MLB’s drastic shift left in 2026. The game has always favored southpaw swingers, but they’ve rarely taken advantage as much as they are this season.
