The Padres added minor league infielder Gage Workman on Monday when they landed Casey Mize from Detroit in a trade deadline deal that sent pitching prospects Kash Mayfield and Jackson Wolf back the other way. It was the kind of move that changes both clubhouses at once: a front-line arm out of Detroit, a minor league infielder into San Diego, and another layer of pressure on a deadline day built around immediate answers.
Workman is the name that matters for San Diego fans because he is the extra piece in the package, the player whose future role has not yet been spelled out. The deal was not framed as a one-for-one swap, and that matters because teams do not usually attach an infielder with no clear big league assignment unless they see a reason to value depth, development, or flexibility. In this case, the Padres got that option alongside a pitcher with a much bigger profile.
Mize arrived with the sort of numbers that make any deadline conversation complicated. In 2026, he had a 2.70 ERA, a 2.58 FIP and 2.9 WAR in 86 2/3 innings, production that showed why Detroit could ask for a meaningful return. But the record behind those numbers was not clean. He missed a few weeks in May with an adductor strain and then a few more in June with adductor inflammation, reminders that his season had already been interrupted even while he was performing at a high level.
That is the part of the trade that changes how it will be judged. Mize had been excellent when healthy, but his injury history stretches back much further than this season, including most of 2022 and all of 2023 while he recovered from Tommy John surgery. He also comes with only one season of club control left before free agency this offseason, which helps explain why Detroit could turn a productive arm into prospects and why San Diego could justify adding him at the deadline.
The Tigers had reasons to stay aggressive even after the move. They went 32-20 since June 1 and reached the deadline just 2 1/2 games out of the final Wild Card spot, a position that made every roster decision harder to read. Jack Flaherty landing on the injured list with a forearm strain only sharpened that picture. Detroit was close enough to keep chasing, but the deadline still forced it to weigh present tense against future value.
Mize and Tarik Skubal were tied for the most WAR by any pitcher moved at the deadline, a measure of just how much talent was on the move Monday. That is what gives this deal its edge: San Diego did not just get a pitcher, and Detroit did not just add prospects. The Padres also got Gage Workman, a minor league infielder whose path is still undefined, which leaves the cleanest answer of all to the next question. For now, he is part of a trade built around Mize, and his assignment will tell the next chapter of San Diego’s deadline.
