Detroit swaps former top pick Casey Mize for San Diego’s fireballing southpaw Kash Mayfield, prioritizing long-term rotation depth in a high-stakes deadline move that reshapes both rosters.
It went down to the wire, but a deal was finally made between the Detroit Tigers and San Diego Padres right at the trade deadline.
The Detroit Tigers are reportedly sending right-handed pitcher Casey Mize and third baseman Gage Workman out west to San Diego.
In return, the Padres are sending their No. 2 prospect, left-handed pitcher Kash Mayfield, along with left-handed pitcher Jackson Wolf to the Mitten State.
For Tigers fans, it isn't much of a surprise to hear that Mize had been dealt. He entered trade conversations back in early July and, at one point, was ranked as high as the No. 8 trade candidate by MLB.com.
The 2018 No. 1 overall pick has spent years grinding to reach ace-level status, and over the last few seasons, he's finally begun living up to the expectations that came with being the first overall selection. Still, over the course of a 162-game season, the word "brittle" has unfortunately come to mind at times. Mize has continuously battled injuries throughout his career, including two separate injured list stints this season alone.
When healthy, however, Mize has developed into one of the most dominant starting pitchers in baseball.
Mize was scratched from his scheduled start to allow him to immediately join his new club, and that's exactly what he'll do with San Diego.
He leaves Detroit with a stellar 2.70 ERA this season, ranking 17th among qualified MLB starting pitchers. In 16 starts, Mize allowed just 26 earned runs while striking out 85 batters. That's coming off a 2025 campaign in which he posted career highs with 139 strikeouts and 14 wins.
Now, Mize takes his talents to the West Coast alongside third baseman Gage Workman. The 26-year-old appeared in 38 at-bats for the Tigers during the team's May struggles, collecting just six hits.
In return, Detroit adds another promising young arm to an organization already built around youth. Players like Riley Greene, Troy Melton, Kevin McGonigle, Max Clark, Dillon Dingler and several others continue to showcase why the Tigers' future remains bright.
The centerpiece of the deal is unquestionably Kash Mayfield, the Padres' No. 2 prospect.
Mayfield most recently appeared in the 2026 MLB Futures Game, where he pitched one inning, faced five batters, walked one, allowed one hit and surrendered one earned run.
While Mayfield isn't currently ranked among MLB's Top 100 prospects, he has all the tools to develop into a reliable middle-of-the-rotation starter. He's the type of pitcher capable of eating innings while consistently commanding the strike zone.
During the 2025 season with San Diego's Single-A affiliate, Mayfield finished with a 1-5 record, but his numbers tell a much different story. He posted an outstanding 2.97 ERA while striking out 88 of the 258 batters he faced, averaging an impressive 13.1 strikeouts per nine innings.
This season with High-A, Mayfield owns a 3-1 record with a 3.54 ERA. While his strikeout rate has dipped slightly to 10.5 per nine innings, he continues to show the ability to command the strike zone and miss bats at a high level.
At just 21 years old, Mayfield has plenty of time to continue developing. The Tigers will likely take a patient approach, but the hope is that he eventually adds another quality arm to a young rotation featuring Troy Melton, Jackson Jobe, Reese Olson, Keider Montero and several other emerging pitchers.
The other player Detroit acquired is Jackson Wolf.
The 27-year-old left-hander stands an imposing 6-foot-7 and throws from the left side. Wolf made one major league start for San Diego back in 2023, tossing five innings while allowing six hits and three earned runs. He walked one batter and struck out one in that appearance.
Currently, Wolf has been pitching for the Padres' Triple-A affiliate, where he's posted a 5-10 record with an ERA north of 7.00. Suffice it to say, Tigers fans probably aren't hoping to see him making many starts in Detroit this season.
Overall, the Tigers unloaded a pitcher whose value was arguably at its highest in exchange for a talented pitching prospect with significant upside. Detroit committed to being sellers at this year's deadline, beginning with the blockbuster Tarik Skubal trade on Saturday and ending Monday by sending Casey Mize to San Diego. Whether the return proves worthwhile won't be known for years, but the organization is clearly betting on its next wave of young talent.
