Angel Zerpa Headed for Tommy John Surgery, Leaving Milwaukee's Bullpen Thinner Than Expected

Per MLB.com's Adam McCalvy, Brewers left-hander Angel Zerpa will undergo Tommy John surgery Monday, ending his 2025 season before it ever really started and wiping out a significant chunk of 2027 as well. Milwaukee acquired Zerpa in a trade, making this a painful, near-immediate loss on an asset they gave up to get.

Zerpa, 25, had become a reliable left-handed weapon out of the bullpen — a southpaw with a deceptive delivery and the kind of soft-contact profile that plays especially well against left-handed lineups. Tommy John surgery carries a 12-to-14 month recovery timeline at minimum, meaning even the most optimistic projection puts him back on a mound in mid-to-late 2026, likely unavailable for meaningful contribution until 2027. He's currently on the 15-day IL and will be shifted to the 60-day IL when Milwaukee needs the roster flexibility.

For a Brewers organization that has built its identity around pitching depth and bullpen construction, losing a left-handed specialist mid-roster move stings differently than a standard injury. Milwaukee will need to backfill that left-handed leverage role from within, whether that's reshuffling internal options or accelerating a prospect's timeline. Every team that loses a key reliever faces a bullpen that gets longer, less predictable, and more exposed to high-leverage situations late in games.

From a betting standpoint, Zerpa's absence tightens Milwaukee's margin for error in close games. Brewers team totals and opponent team totals both bear watching, particularly against left-handed-heavy lineups that Milwaukee can no longer neutralize as cleanly in the sixth through eighth innings. Opponents' left-handed bats — especially in the middle of the order — now face a softer path to at-bats against the Brewers' relief corps. That's a live angle on opposing hitter total bases and RBI props when Milwaukee's starter exits early or the game is tight through five. The first-five-innings line is also worth monitoring: if the Brewers' starter stumbles, the safety net is thinner.

The Brewers' team total has already been a cautious market in 2025 given their offense's inconsistency. Adding bullpen vulnerability to that equation doesn't make Milwaukee a fade blindly, but it does lower the ceiling on their ability to strand leads and strand runners — which over a long season shows up in run prevention numbers. Watch for the Brewers' opponent team total to tick up in spots where they're facing a left-handed-heavy lineup and their starter is on a pitch count.