The Tigers made their biggest move of the deadline right at the wire, sending Casey Mize to the San Diego Padres on Monday in a deal that closed the book on one of the club’s most important arms.
Mize, the No. 1 overall pick in the 2018 draft, goes to San Diego with Triple-A utility player Gage Workman. In return, Detroit landed two minor-league left-handers: Kash Mayfield, 21, and Jackson Wolf, 27.
A source familiar with the situation confirmed multiple media reports to The Detroit News.
There had been some expectation that the Tigers might keep Mize after dealing Tarik Skubal to the Los Angeles Dodgers, especially with Mize set to become a free agent after the season. Instead, Detroit moved another pillar from its rotation while the deadline clock was running out.
“I’m preparing to pitch Tuesday,” he said Sunday. “I don’t know if that will be here or elsewhere. I am ready for it to get figured out, one way or another.”
Mize and Skubal had become central pieces in Detroit’s rise from rebuild to contention. Mize’s path to this point has been anything but smooth.
He missed most of the 2022 and 2023 seasons while working back from elbow and back surgeries, then returned to make the All-Star team in 2025. He went 14-6 with a 3.87 ERA that season.
This year, even with two trips to the injured list because of a groin strain, Mize helped steady the Tigers’ rotation. He finished with a 2.70 ERA for Detroit before the trade.
The move sends him to a Padres team sitting one game out of the third wild-card spot in the National League. Detroit, meanwhile, sits 2½ games out of the third wild-card spot.
Mayfield gives the Tigers another premium arm to add to the system. He was the Padres’ first-round pick in 2025 and is their No. 2 prospect. At High-A Fort Wayne this season, his second pro year, he went 3-1 with a 3.54 ERA while averaging 10.5 strikeouts and 3.7 walks per nine innings.
Wolf, the other pitcher coming back to Detroit, is 6-7 and has already had a brief taste of the majors. He debuted in a one-game appearance with the Padres in 2023 and, on that day, beat the Tigers at Comerica Park.
He was sent right back to Triple A after that outing and has remained there. This season at Triple-A El Paso, he struggled to a 7.05 ERA and a 1.668 WHIP, allowing 16 home runs in 89.1 innings.
Detroit did not make any other deadline moves. Kenley Jansen and Gleyber Torres stayed put, even though both are free agents after the season.
The Tigers ended up making four trades in all. Along with Skubal and Mize, they also sent catcher Jake Rogers to Baltimore and outfielder Jahmai Jones to Boston. In those deals, Detroit added six pitchers to its system, including lefty JoJo Ingrassia from Boston and right-hander Zane Barnhart from Baltimore, plus the high-end outfield prospect Zyhir Hope from the Dodgers.
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