Red Sox Shut Down Slaten; Crochet's Bullpen Path Gains Clarity

Boston reliever Justin Slaten will not pitch again this season. After a month on the injured list with right elbow inflammation, Slaten visited Rangers team physician Dr. Keith Meister on Tuesday and received a diagnosis of degenerative changes in the flexor mass—the kind of structural damage that ends a campaign. Interim manager Chad Tracy announced a platelet-rich plasma injection and functional shutdown. Slaten, who posted a 4.60 ERA across 36 appearances with a 2-4 record, last threw a scoreless inning on August 12 against Toronto.

The depth cost is real. Slaten is one of eight Red Sox pitchers currently on the injured list, a roster drain that underscores Boston's health crisis down the stretch. In a compressed September race, losing a multi-inning reliever with even league-average command compounds the problem. The Red Sox are banking that their remaining arms—and the ones coming back—can stabilize what may be a fragile bullpen heading into October.

Crochet, by contrast, took a meaningful step forward. The left-hander, sidelined since late April with shoulder inflammation and a subsequent lat strain, threw approximately 30 pitches before Tuesday's game against Arlington. Tracy framed it as the most volume Crochet has handled yet, with evaluation ongoing. Crochet was the AL Cy Young runner-up last season but arrived this year at 3-3 with a 6.30 ERA in six starts before injury struck. The plan is conditional: "We'll see over the next few days how he feels and then we'll go from there." The implication is that Crochet could pitch in relief during the playoffs rather than return as a starter.

For prop bettors tracking Red Sox bullpen construction, the Crochet timeline matters. A healthy Crochet in relief—even limited to 2-3 innings per appearance—fundamentally shifts strikeout distribution in tight games. His career strikeout rate sits above 11 per nine innings. If Boston makes the postseason and Crochet is available, games in which he appears will see elevated K totals relative to baseline closer-only models. The market has priced Crochet as unlikely to contribute; late-inning relief appearances would be a pricing surprise and should trigger prop line compression on his strikeout totals the moment he's officially activated to the roster.

Slaten's shutdown, meanwhile, removes a variable from bullpen-volume props. Losing depth forces the Red Sox to lean on higher-leverage arms in lower-leverage spots, which raises the average velocity and usage of remaining relievers. This is a negative for Red Sox under-total bettors who were banking on multiple appearances from lower-velocity secondary arms. The bullpen gets leaner, shorter, and hotter—precisely the conditions that correlate with fewer total innings pitched per game.