Cantillo has joined the Guardians in Boston and is expected to be recalled from Triple-A Columbus to start Wednesday's game versus the Red Sox, Paul Hoynes of The Cleveland Plain Dealer reports.

Logan Allen had been lined up to start Wednesday, but it's not clear whether he'll be pushed back in the schedule or moved to the bullpen. Cantillo posted a 6.52 ERA and 12:4 K:BB over 9.2 innings in his two starts with Columbus after being demoted last month. He's collected a 3.93 ERA and 80:36 K:BB over 66.1 frames covering eight starts and 21 relief appearances in the majors this season.

The Reds designated La Sorsa for assignment Tuesday.

The transaction frees up a spot on the 40-man roster for the addition of Reiver Sanmartin. La Sorsa has made five appearances out of the Reds' bullpen this season, allowing nine runs (eight earned) in 6.2 innings.

The Reds optioned Moll to Triple-A Louisville on Tuesday, Charlie Goldsmith of Fox 19 Now Cincinnati reports.

The Reds have a bullpen game Tuesday against the Blue Jays and needed a reliever who can provide more length than Moll, who has covered just 18.1 frames in his 23 appearances this season. Reiver Sanmartin is taking Moll's spot on the roster.

The Reds selected Sanmartin's contract from Triple-A Louisville on Tuesday, Charlie Goldsmith of Fox 19 Now Cincinnati reports.

Sanmartin hasn't pitched in the majors since 2023 but has had a nice season at Louisville, collecting a 2.79 ERA and 44:17 K:BB over 58 innings. He could be asked to eat multiple innings during a bullpen game Tuesday versus the Blue Jays.

Barlow will serve as the Reds' opening pitcher in Tuesday's contest versus the Blue Jays, Gordon Wittenmyer of The Cincinnati Enquirer reports.

Nick Lodolo was scheduled to start but was scratched due to an illness, so the Reds will go with an impromptu bullpen game Tuesday. Barlow will likely pitch an inning or two before being followed by a slew of relievers.

The White Sox optioned Booser to Triple-A Charlotte on Tuesday.

The left-hander was called up by Chicago last week and will return to Charlotte after giving up two runs in two innings over three appearances. Booser has an underwhelming 4.82 ERA, 1.46 WHIP and 33:18 K:BB over 28 frames in the majors this year.

The White Sox recalled Hudson from Triple-A Charlotte on Tuesday.

The left-hander was up with Chicago for a couple days in early August after being claimed off waivers and will now receive another look in the majors. Hudson has made 15 appearances between the Brewers and White Sox this year and has a 5.14 ERA, 1.93 WHIP and 17:13 K:BB over 14 innings.

The Mets optioned Waddell to Triple-A Syracuse on Tuesday, Michael Mayer of MetsmerizedOnline.com reports.

Waddell tossed 4.1 scoreless innings out of the bullpen in Sunday's loss to the Marlins but now finds himself back in the minors. The Mets have elected to replace him on the roster with a position player in Jared Young.

The Tigers recalled Gipson-Long from Triple-A Toledo on Tuesday, Chris McCosky of The Detroit News reports.

Gipson-Long will start Tuesday's game at home against the Mets, and manager A.J. Hinch said the right-hander will get either another start or bulk relief outing next week versus the Yankees. The righty hasn't reached the five-inning mark in an appearance since late June, so he won't pitch terribly deep into Tuesday's game.

The Tigers optioned Lee to Triple-A Toledo on Tuesday, Chris McCosky of The Detroit News reports.

Lee had just been recalled Monday and will be sent back down without having made an appearance. He's making space on the active roster for Sawyer Gipson-Long, who will start Tuesday's game against the Mets.