MLB Player News

Bolton will serve as the Astros' starter for Sunday's series finale against the Red Sox, Chandler Rome of The Athletic reports.

Bolton was activated from the 15-day injured list Thursday and pitched out of the bullpen later that day against the Orioles, allowing one run on one hit and one walk in one inning. He's previously started on two occasions for Houston this season, maxing out at 4.1 innings between those outings. With that in mind and because he's pitching on two days' rest, Bolton is unlikely to work deep enough into Sunday's contest to qualify for a win, though he should offer the Astros more length than a typical opening pitcher.

Imanaga (3-2) earned the win over Arizona on Saturday, allowing four hits and issuing one walk while striking out five batters over seven scoreless innings.

Imanaga allowed just one extra-base hit (a double) and didn't allow any runners to reach third base. The southpaw was efficient in needing just 87 pitches to complete seven frames, and he racked up 14 whiffs. This was an excellent bounce-back performance for Imanaga after he allowed a season-worst five runs (four earned) in a loss against the Dodgers in his previous start. He's in the midst of a strong season overall, posting a 2.40 ERA, 0.85 WHIP and 43:10 K:BB over 41.1 innings spanning seven starts.

The Mariners optioned Simpson to Triple-A Tacoma on Saturday, Daniel Kramer of MLB.com reports.

The Mariners recalled Simpson from Triple-A on Friday, but he'll now be sent back to the minors a day later without appearing in a game for Seattle. Nick Davila was selected from Double-A Arkansas in a corresponding move.

Graterol (shoulder) will begin a rehab assignment at Triple-A Oklahoma City on Saturday, Triple-A Oklahoma City broadcaster Alex Freedman reports.

Graterol's first minor-league outing will mark his first appearance in a game at any level since the 2024 World Series. Because he's been sidelined for so long since undergoing surgery on his right shoulder, he will likely require an extended stay at Triple-A before the Dodgers add him back to their bullpen.

Manager A.J. Hinch said Saturday that Jansen has been day-to-day with right groin/abdomen soreness, Cody Stavenhagen of The Athletic reports.

Jansen has been dealing with the injury ever since his most recent appearance Wednesday in Atlanta, during which he conceded two earned runs and failed to record an out. He doesn't seem to be trending toward a trip to the injured list at the moment, though that could change if he doesn't return within the next few days.

The Tigers selected Vanasco's contract from Triple-A Toledo on Saturday, Cody Stavenhagen of The Athletic reports.

After posting a 0.00 ERA and 0.80 WHIP to go with his 28:4 K:BB through 15 innings in Triple-A, Vanasco will return to the majors for the first time since 2024 to replace the injured Will Vest (forearm). Although Vanasco has been dominant in the minors up to this point, he'll likely settle in as a middle reliever with Detroit.

The Tigers placed Vest on the 15-day injured list Saturday with right forearm inflammation, Cody Stavenhagen of The Athletic reports.

Vest hasn't appeared in a game since Sunday, and manager A.J. Hinch hinted Friday that Vest's absence has been due to some kind of injury. Now that he's known to be dealing with a forearm issue, he'll spend at least the next couple of weeks on the injured list while Ricky Vanasco comes up from Triple-A Toledo to fill the void in Detroit's bullpen.

Hader (biceps) will begin a rehab assignment with Triple-A Sugar Land on Tuesday, Chandler Rome of The Athletic reports.

Hader has been facing live hitters for the past couple of weeks while working his way back from left biceps tendinitis, and he's now ready to begin testing his arm in a competitive setting. The 32-year-old reliever was moved to the 60-day IL in April, so he will have plenty of opportunities to ramp up in the minors before becoming eligible to rejoin the Astros on May 24. Tatsuya Imai (arm) and Nate Pearson (elbow) are scheduled to pitch for Sugar Land on Tuesday as well.

The Nationals recalled Ribalta from Triple-A Rochester on Saturday.

Ribalta has pitched well in the minors this season, boasting a 2.25 ERA and 0.88 WHIP across eight innings with a 7:3 K:BB. He last saw major-league action April 17, when he earned the save against the Pirates after tossing a scoreless ninth inning. Cionel Perez was outrighted to Triple-A in a corresponding move.

Perez cleared waivers and was assigned outright to Triple-A Rochester on Saturday.

Perez was removed from the 40-man roster after Friday's outing against the Brewers, when he allowed two hits across two scoreless innings. He has a shaky 6.19 ERA and 1.69 WHIP across 16 innings this season and will look to get his command and control in order in Triple-A. Orlando Ribalta was recalled by the Nationals from Rochester in a corresponding move.