Robert Gasser, Pitch by Pitch: NLCS Game 3 Analysis

Mookie Betts had a chance to change Robert Gasser’s fifth inning. After a leadoff walk and a flyout, Gasser opened their confrontation with a sweeper for a called strike and another for a missed swing. Betts fouled off a 94.0 mph sinker, took a sweeper outside and lined the next sinker into center field at 97.8 mph. Garrett Mitchell’s diving catch kept the inning scoreless.

That sequence captures both sides of Gasser’s start in Milwaukee’s 6–2 win over Los Angeles in NLCS Game 3 on October 14. He changed the balance of his repertoire, made the sinker his primary pitch and completed five innings on 72 pitches. The Dodgers also put enough balls in play to make the Brewers’ fielding part of the explanation.

Gasser allowed three hits, walked one, hit one batter and struck out three. He left with Milwaukee ahead 1–0. The comparison below uses 1,735 physical pitches in his 20 regular-season Milwaukee starts from May 17 through September 25, keeping relief appearances and postseason work outside the baseline.

The sinker became the main pitch

The largest change was the sinker: 39 of 72 pitches, or 54.2%, compared with 22.7% during those regular-season starts. That is an increase of 31.5 percentage points. The pitch supplied eight called strikes and three missed swings, giving Gasser a way to acquire strikes through both takes and attempts at contact.

His sinkers averaged 94.0 mph, up from 92.6 in the baseline. Their measured induced vertical break averaged 6.2 inches against 6.8 in the season sample. That measure describes movement relative to a gravity-only trajectory. The speed increase was more pronounced than the difference in vertical movement.

Sweepers supplied 20 pitches, or 27.8%, close to the baseline’s 25.1%. They averaged 82.3 mph against 80.4 and produced three misses in six swing attempts. The major redistribution came elsewhere: cutters fell from 18.5% to 8.3%, four-seamers from 22.9% to 6.9%, and changeups from 10.4% to 2.8%. Gasser kept five classifications in the outing while concentrating far more of his work in the sinker.

Across the complete start, hitters missed seven of 34 swing attempts, a 20.6% whiff rate under the definitions below. Gasser added 13 called strikes. Those are separate routes to a strike, and neither should be confused with the official count of 47 strikes, which also includes fouls and contact.

The contact behind a scoreless line

The Dodgers put 15 balls into play, and all 15 have measured exit velocities. Seven reached the 95 mph hard-hit threshold. The average was 92.7 mph. A three-hit, scoreless line therefore describes the outcome more cleanly than it describes the quality of every ball the Dodgers struck.

Milwaukee turned several of those opportunities into outs. Luis Lara’s sliding catch took away Freeman’s first-inning fly ball, and Mitchell caught Betts’ fifth-inning liner. Freeman also hit a 99.9 mph fly ball in the third that became an out. Those events matter when explaining why the shift toward sinkers produced five scoreless innings rather than assuming that every out came from weak contact.

Gasser’s longest inning required 16 pitches, and none exceeded that total. After Betts’ liner in the fifth, he finished Freeman with a sweeper on a 1–2 count for a groundout. His final 15-pitch inning brought the total to 72, leaving the bullpen the last four innings.

The start established a substantial selection change and a faster sinker. The next useful comparison is whether he continues to use the pitch this heavily while changing the amount of hard contact. Here, the complete record gives equal weight to the repertoire shift and the fielding that helped preserve it.