Brewers lefty Brian Fitzpatrick’s MLB run ends with Tommy John surgery

Milwaukee’s young left-handed bullpen piece Brian Fitzpatrick is expected to miss a major stretch after undergoing Tommy John surgery earlier this week, according to Milwaukee manager Pat Murphy as reported by Curt Hogg of the Milwaukee Journal Sentinel and relayed through baseball transaction coverage. Murphy’s comments came shortly after Fitzpatrick’s first taste of the majors ended, a premature conclusion that will force the Brewers to reshuffle leverage innings and lefty options well into the next calendar year.

Fitzpatrick’s 2026 big league opportunity appears to have lasted only briefly, with one report describing his rookie season as already over after just five games. Before the surgery, he had already been moved to the injured list, first placed on the 15-day IL in early June with an elbow issue, then shifted to the 60-day IL after the injury was diagnosed as a partial UCL sprain. Those timelines matter because they report the team’s expectation that this was not a short-term tweak, but a ligament problem requiring reconstruction.

The timing also frames what Milwaukee can reasonably expect next. Based on the standard recovery window for Tommy John surgery described in the same reporting, Fitzpatrick is expected to be sidelined until late August or early September 2027 at the absolute earliest, with the possibility of missing the entire 2027 season. That degree of uncertainty is especially consequential for a rookie who had just begun to establish himself as a potential long-term bullpen answer.

Even in a small sample, Fitzpatrick’s initial MLB results offered reasons for hope. Over 6 2/3 innings in his early call-up, he posted a 1.35 ERA. The same reporting noted that underlying strikeout and walk rates were less dazzling than the ERA suggested, with a 16.7% strikeout rate and 10% walk rate. Still, his run-prevention profile leaned heavily on keeping hitters from getting the ball in the air, as he generated a 54.5% groundball rate in those first major league outings, the highest mark of his pro career.

Those early MLB flashes were preceded by more encouraging Triple-A production. Fitzpatrick earned his promotion after posting a 1.13 ERA in 16 innings for Triple-A Nashville earlier in 2026, backed by a much stronger 32.3K% strikeout rate, a 6.5BB% walk rate, and a 50% groundball rate. The broader development arc for the lefty also points to why Milwaukee felt comfortable using him in the relief mix: he had already spent 2024 in a relief role in the minors, and the reporting characterizes him as having been a full-time bullpen arm over the last two years.

From a roster-planning standpoint, Fitzpatrick’s surgery adds to the Brewers’ recent bullpen stress involving the left side of their pitching staff. Another left-handed reliever, Angel Zerpa, underwent Tommy John surgery in May, and the same reporting indicates Milwaukee has lost two left-handed arms to UCL injuries within the span of the season. The immediate consequence is straightforward: Milwaukee will have to lean harder on remaining left-handers and right-handers to cover matchups, while balancing innings for the rest of the relief group as the 2026 stretch approaches its postseason picture.

What to watch next is how Milwaukee fills the lefty void during 2026 and how it manages Fitzpatrick’s long-term development. With a projected return no earlier than the late-season window in 2027, the Brewers’ bullpen plan may be shaped more by internal options and near-term transactions than by counting on Fitzpatrick for routine high-leverage work next summer. The longer-term question will be whether his command and groundball tendencies that showed up early in the majors can translate post-recovery when he gets back on a mound in regular-season games.