Gage Jump (0-1, 7.20) makes his second big-league start against Jameson Taillon (2-4, 5.37) at 7:05 PM CT. Jump's debut against Seattle was a survival job — 5 innings, 9 hits, 4 earned — but the lefty earned this call by torching the PCL with 11 scoreless and 15 strikeouts over his last 2 Triple-A starts. Taillon, meanwhile, has been a home-run pinata in 2026 and Wrigley with a breeze blowing out is not the place to fix that.
Chicago opens a 22-game run against teams with losing records, and oddsmakers are treating it accordingly: Pinnacle has the Cubs at -117 with a fair win probability hovering near 53%. The A's just coughed up a 13-run third inning to the Yankees on Saturday — the biggest single frame New York has put together since 2005 — so confidence around this rotation isn't exactly soaring.
The Cubs come in 32-28 and just dropped the rubber game in St. Louis, but they'd taken 3 of 4 before that and the lineup has been the steadier half of this team. The A's are 28-31 and have lost 4 of 5, all at home, which is the part that should worry Oakland — they couldn't hold serve in front of their own crowd and now they're traveling.
- Day-To-DayLeo De Vries SS — De Vries went 3-for-5 with two solo home runs Sunday for Double-A Midland.
- 10-Day-ILMax Muncy 3B — Muncy (hand) will serve as the designated hitter for Triple-A Las Vegas on Saturday, Martin Gallegos of MLB.com reports.
- 10-Day-ILJacob Wilson SS — Wilson (shoulder) has been ramping up his baseball activities and could begin a rehab assignment next week, Martin Gallegos of MLB.com reports.
- 15-Day-ILLuis Severino SP — Severino was removed from Friday's game against the Yankees with right arm soreness, Martin Gallegos of MLB.com reports.
- 15-Day-ILAaron Civale SP — The Athletics placed Civale on the 15-day injured list Tuesday due to right shoulder tendinitis.
- 15-Day-ILBrooks Kriske RP — Kriske (shoulder) will be shut down from throwing for at least three weeks, Jason Burke of SI.com reports.
- 60-Day-ILDenzel Clarke CF — Clarke (hamstring) will receive a platelet-rich plasma injection Tuesday, Martin Gallegos of MLB.com reports.
- 60-Day-ILGunnar Hoglund SP — Hoglund (knee/back) will be sidelined for the rest of the 2026 season after undergoing surgery on his left hip Monday.
- Day-To-DayBrandon Birdsell RP — Birdsell (elbow) will miss the entire 2026 season, Jim Callis of MLB Pipeline reports.
- Day-To-DayJeff Brigham RP — Brigham was placed on the 7-day injured list at Triple-A St. Paul, retroactive to April 6, with a left oblique strain, TwinsDaily.com reports.
- Day-To-DayJaxon Wiggins SP — Cubs manager Craig Counsell said that Wiggins was placed on Triple-A Iowa's 7-day injured list Wednesday due to right elbow inflammation, Meghan Montemurro of the Chicago Tribune reports.
- 10-Day-ILMatt Shaw RF — Shaw went 3-for-4 with a double, a solo home run and an additional run scored in Wednesday's 5-4 win over the Padres.
- 15-Day-ILMatthew Boyd SP — Boyd (knee) struck out two batters and allowed three runs (two earned) on four hits and one walk across four innings Sunday in a rehab start with Triple-A Iowa.
- 15-Day-ILEdward Cabrera SP — Cabrera (finger) threw a 25-pitch bullpen session Thursday and had been scheduled to throw off the mound Sunday with greater intensity, Meghan Montemurro of the Chicago Tribune reports.
- 15-Day-ILRiley Martin RP — Martin has been diagnosed with flexor strain in his left elbow and is expected to miss eight weeks, Taylor McGregor of Marquee Sports Network reports.
- 60-Day-ILHunter Harvey RP — The Cubs moved Harvey (triceps) from the 15-day IL to the 60-day IL on Sunday.
The injury column is where this gets ugly for both sides. The A's are without Luis Severino (arm soreness, 15-day IL), Aaron Civale (shoulder), and Gunnar Hoglund (done for the year), plus Jacob Wilson and Max Muncy are still working back. The Cubs counter with a rotation missing Justin Steele, Cade Horton, Matthew Boyd and Edward Cabrera — which is how you end up handing the ball to Taillon and hoping for the best.
Take Chicago to win the opener, but don't expect a clean one. Jump has swing-and-miss stuff and Taillon will give up a couple of loud outs — this feels like a 6-4 type of night where the Cubs' offense plays the role of tiebreaker.