First pitch is 12:40 PM CT at Comerica, and the matchup card tells the story: Luis Castillo (2-5, 5.53) against Jack Flaherty (1-7, 5.31). Castillo's last outing was 4 scoreless innings against the Athletics on May 25, but per DK Network two of his last three appearances were out of the bullpen, so the leash here is a real question. Flaherty walked into his last start at Tampa Bay and spun 5 innings of shutout ball for his first win of the year.
The Mariners come in at 34-31 and just laid a 4-0 beating on Detroit on Saturday. They're doing it without Cal Raleigh (oblique, starting a rehab assignment with High-A Everett on Sunday) and likely without J.P. Crawford again — he sat Saturday with a hand issue. The Tigers, meanwhile, were riding a 4-game heater before getting blanked. A.J. Hinch's rotation is held together with tape: Skubal on a rehab start, Verlander targeting a return next week against Minnesota, and Mize and Jobe still working back.
Pinnacle has Seattle at -115 with the total parked at 8.5 (under -115), which feels like the market shrugging at both rotations and trusting the bullpens to keep things from getting silly. The Mariners are technically favored, but a -115 number for a road team with a 5.53 ERA starter against a team that just won 4 straight is the book telling you it doesn't trust either side much.
- Day-To-DayJ.P. Crawford SS — Crawford (hand) isn't in the lineup for Saturday's game against Detroit.
- Day-To-DayTeddy McGraw SP — McGraw is working his way back from right elbow issues, Jonathan Mayo of MLB Pipeline reports.
- 10-Day-ILCal Raleigh C — Raleigh (oblique) will begin a rehab assignment with High-A Everett on Sunday, Daniel Kramer of MLB.com reports.
- 10-Day-ILBrendan Donovan 3B — Mariners general manager Justin Hollander said Sunday that Donovan will receive a platelet-rich plasma injection for his strained left groin as well as his adductor and is expected to resume baseball activity in 2-to-3 weeks, Daniel Kramer of MLB.com reports.
- 10-Day-ILWill Wilson 3B — The Mariners placed Wilson on the 10-day injured list Saturday due to a fractured left thumb.
- 60-Day-ILMiles Mastrobuoni 3B — Mastrobuoni (calf) began a rehab assignment Monday with the Mariners' Arizona Complex League affiliate, going 0-for-2 with a 1:1 K:BB.
- 60-Day-ILLogan Evans SP — The Mariners placed Evans (elbow) on the 60-day injured list Monday.
- 60-Day-ILCarlos Vargas RP — Vargas (lat) has suffered a setback in his recovery, Ryan Divish of The Seattle Times reports.
- Day-To-DayDugan Darnell RP — The Tigers announced Sunday that Darnell (hip) has been playing catch five times a week and is also taking part in a running progression, Evan Petzold of the Detroit Free Press reports.
- Day-To-DayJosue Briceno C — Briceno said Friday that he expects to be sidelined a few months after having surgery Wednesday to repair a tendon in his right wrist, Evan Petzold of the Detroit Free Press reports.
- 10-Day-ILJavier Baez SS — Tigers manager A.J. Hinch said Tuesday that Baez (ankle) has been shut down from baseball activities for an unspecified length of time, Chris McCosky of The Detroit News reports.
- 15-Day-ILTarik Skubal SP — Skubal (elbow) will make a rehab start with High-A West Michigan on Sunday, Jason Beck of MLB.com reports.
- 15-Day-ILKenley Jansen RP — Jansen (pelvis) is throwing a bullpen session ahead of Friday's game against the Mariners, Chris McCosky of The Detroit News reports.
- 15-Day-ILCasey Mize SP — Mize (adductor) tossed a bullpen session Tuesday, Chris McCosky of The Detroit News reports.
- 15-Day-ILBurch Smith RP — Smith has been diagnosed with right shoulder soreness and received a cortisone injection Friday, Evan Petzold of the Detroit Free Press reports.
- 60-Day-ILTrey Sweeney SS — Sweeney will undergo season-ending shoulder surgery this week, Cody Stavenhagen of The Athletic reports.
The Flaherty wild card is real. Per Motor City Bengals, his walk rate has spiked from 6% in 2025 to 14% this year, which is how a guy with stuff this clean ends up 1-7. If the strike zone shows up, that Tampa start was a glimpse of what the Tigers paid for. If it doesn't, Seattle's lineup — Raleigh-less but still dangerous — has every reason to make him pay early.
Bottom line: a get-away day matinee between two clubs in very different places in the standings, with starters who are each one bad inning away from handing it to a reliever. Take the under at your own risk — both of these guys can implode, but both can also limp through 5. Lean Seattle, expect chaos, and don't be shocked if this thing is decided by the 7th-inning matchups more than anything Castillo or Flaherty does.