The San Diego Padres acquired right-hander Casey Mize from the Detroit Tigers in a trade deadline deal on August 3, 2026. San Diego parted with top prospect Kash Mayfield and pitcher Jackson Wolf, while also landing infielder Gage Workman, as the Padres aggressively reshaped their starting rotation for a playoff push.
The San Diego Padres pushed their chips into the middle of the table just before Major League Baseball’s trade deadline on August 3, 2026, securing right-hander Casey Mize from the Detroit Tigers in one of the final major moves of the day. The blockbuster arrived on the heels of San Diego’s acquisition of former American League Cy Young Award winner Robbie Ray from the San Francisco Giants, completely overhauling a starting rotation that president of baseball operations A.J. Preller targeted for immediate reinforcement.
For the Padres, who entered the week with a 58-54 record and sitting just one game out of the National League wild-card race, the deadline aggression signaled a clear commitment to October baseball. Rather than entertaining talk of selling off bullpen assets like closer Mason Miller, San Diego doubled down on bolstering a rotation that had faced depth challenges throughout the 2026 campaign.
The Return Package: Detroit Lands Top Prospects
Detroit acquired 21-year-old left-hander The Detroit News, who ranked as San Diego’s No. 2 prospect according to MLB Pipeline. Mayfield, the Padres’ first-round pick at No. 25 overall in the 2024 MLB Draft out of an Oklahoma high school, posted a 3.54 ERA with 62 strikeouts and 22 walks across 53â…“ innings with High-A Fort Wayne this season.
The deal also sent 27-year-old left-hander Jackson Wolf to Detroit. Wolf, standing 6-foot-7, debuted in the majors with San Diego in 2023 in a memorable matchup against the Tigers at Comerica Park where he earned a win. He spent time at Triple-A El Paso, where he struggled to a 7.05 ERA and a 1.668 WHIP across 89.1 innings while surrendering 16 home runs.
The trade for Mize comes immediately after Detroit dealt two-time Cy Young winner Tarik Skubal to the Los Angeles Dodgers for a package featuring outfield prospect Zyhir Hope and right-handed starter River Ryan.
Casey Mize’s Ascent in Detroit and Path to Free Agency
Selected No. 1 overall by the Tigers in the 2018 MLB Draft, Mize endured a winding, injury-disrupted tenure in Detroit. After debuting in the COVID-shortened 2020 campaign, he showed promise in 2021 before requiring Tommy John and back surgeries that wiped out both his 2022 and 2023 seasons. Another injury-plagued year followed in 2024, leaving him off the roster for Detroit’s American League Division Series run.
The right-hander broke through in 2025, earning his first All-Star nod while going 14-6 with a 3.87 ERA in 149 innings. He carried that momentum into 2026, compiling a 4-6 record alongside a career-best 2.70 ERA, a 0.99 WHIP, and 85 strikeouts across 86 2/3 innings over 16 starts. Despite missing time with two separate groin strains, Mize led all Tigers pitchers in fWAR prior to the All-Star break.
“I’m preparing to pitch Tuesday. I don’t know if that will be here or elsewhere. I am ready for it to get figured out, one way or another.”
Casey Mize, Detroit Tigers starting pitcher
With his contract expiring at the conclusion of the season, the Padres acquire a high-upside rental for their stretch run, though Preller’s history suggests potential interest in an extension if the partnership succeeds.
National League Wild Card Implications for San Diego
The addition of Mize directly addresses San Diego’s most glaring vulnerability. Armed with a fastball sitting in the mid-90s, an improved changeup, and significantly suppressed home-run numbers—surrendering only five long balls this year compared to 19 across 149 frames in 2025—Mize joins a rotation poised to regain injured starters Joe Musgrove and Nick Pivetta in the coming weeks.
San Diego leaves August 3 situated just one game back of the final National League wild-card position. Having won eight of their last nine games prior to the deadline, the Padres will rely on their newly reinforced pitching staff to navigate the final 50-plus contests of the regular season.
