The Guardians optioned Herrin to Triple-A Columbus on Saturday.

The 28-year-old southpaw will head back to the minors after less than a week with the Guardians to make room for Carlos Hernandez, who was claimed off waivers from Detroit on Thursday. Herrin carries a 4.06 ERA and 1.55 WHIP through 31 innings with Cleveland this season and could very well rejoin the big-league squad later this summer if/when the Guardians need bullpen help.

The Guardians recalled Hernandez from Triple-A Columbus on Saturday.

Hernandez owns a 6.69 ERA and 1.79 WHIP this year through 36.1 innings between the Tigers and Phillies. After being claimed by the Guardians on Thursday, the 28-year-old will replace Tim Herrin in Cleveland's bullpen and will most likely be limited to low-leverage situations.

The Red Sox optioned Criswell to Triple-A Worcester on Saturday.

Criswell fired seven innings of one-run ball Friday against the Astros, but he'll end up as the roster casualty necessary to make room for Dustin May in Boston's rotation. Criswell sports a 3.57 ERA through 17.2 innings with the Red Sox this season and would likely be the next man up if any of Boston's starters need to miss time down the stretch.

Varland struck out one in a perfect seventh inning during Friday's loss to the Royals.

He fired 12 of 14 pitches for strikes in his Toronto debut. Acquired at the trade deadline from the Twins, Varland entered the game with his new team down 5-1, but he should quickly slot into a high-leverage role for the Jays, joining Yariel Rodriguez, Seranthony Dominguez and Yimi Garcia (elbow) as right-handed setup options in front of closer Jeff Hoffman.

The Royals designated Hatch for assignment Saturday.

Hatch will be jettisoned from the Royals' 40-man roster after giving up two run in one inning during his season debut Friday. Jonathan Bowlan was also optioned off the active roster Saturday to make room for Ryan Bergert and Bailey Falter.

The Royals optioned Bowlan to Triple-A Omaha on Saturday.

Bowlan will depart Kansas City's bullpen to help make room for new additions Ryan Bergert and Bailey Falter on the active roster. Bowlan owns a 4.73 ERA and 1.35 WHIP through 26.2 innings in the majors, though he may return to the Royals down the stretch if the big club needs a fresh arm.

Hanifee (3-3) allowed two runs (one earned) on two hits while retiring only two batters to take the loss in Friday's 5-4 defeat to the Phillies.

After starter Jack Flaherty allowed just one run across six innings, the Detroit bullpen allowed four runs (three earned) in only two innings to let the game slip away. Hanifee was right in the middle of the collapse, and he allowed his first earned run since July 2, snapping a streak of nine appearances in which he allowed just two unearned runs. The righty still has a solid 3.10 ERA overall this season, and he should remain a key piece of a Detroit relief corps that added several reinforcements before the trade deadline.

Smith (3-4) came away with the win against the Twins on Friday after tossing two perfect innings while striking out three batters.

Smith was dispatched in the ninth inning to keep the game tied at 2-2, and his efforts were rewarded after Kyle Manzardo walked off the Twins in the 10th with an RBI single. Smith appears to be the next man up at closer for the Guardians with Emmanuel Clase on non-disciplinary leave through Aug. 31 as part of MLB's sports-betting investigation. In 21 appearances since the beginning of June, Smith boasts a 3.32 ERA, 1.06 WHIP and 27:7 K:BB across 21.2 innings.

The Rays optioned Kelly to Triple-A Durham on Saturday.

After posting a 5.93 ERA and 1.57 WHIP through 27.1 innings with the Rays, Kelly will lose his place in the big-league bullpen. His departure will make room on the roster for right-hander Adrian Houser, who was acquired in a trade with the White Sox on Thursday.

Wilson earned the save after throwing two clean shutout innings with three strikeouts during Friday's 6-3 win over the Angels.

Wilson was asked to get the final six outs of the game Friday and looked extremely sharp while doing so, sending the Angels down in order two times in a row to pick up his second save of the season. After a tough July in which he allowed 16 hits and seven runs in nine innings pitched, the 30-year-old needed this kind of outing. The right-hander holds a 2.92 ERA with 36 strikeouts in 37 innings pitched as one of the most trusted options out of the White Sox bullpen.