The Tigers recalled Guenther from Triple-A Toledo on Thursday.
Guenther made one relief appearance with the Tigers earlier this month, allowing one earned run over 1.1 innings of work. The left-hander will likely be with the big club only for a few days until Alex Faedo is back from paternity leave.
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Tigers' Sean Guenther: Heads back to Triple-A
Rotowire
The Tigers optioned Guenther to Triple-A Toledo on Sunday.
He'll cede his spot on the active roster to lefty Brant Hurter, who was called up from Triple-A in a corresponding move and is expected to work in bulk relief behind opening pitcher Alex Faedo in Sunday's game against the Royals. Following his promotion from Toledo on Thursday, Guenther made one appearance out of the Detroit bullpen, giving up an earned run on one hit and two hit batsmen over 1.1 innings.
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Tigers' Sean Guenther: Summoned from minors
Rotowire
The Tigers selected Guenther's contract from Triple-A Toledo on Thursday, Cody Stavenhagen of The Athletic reports.
Guenther is one of the arms being added as the Tigers replace some pitchers they traded away earlier this week. The lefty holds a 3.86 ERA and 46:14 K:BB across 44.1 innings with Toledo this season. He has not made an appearance in the majors since 2021.
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Tigers' Sean Guenther: Healthy again at Double-A
Rotowire
Guenther (elbow) has made two relief appearances for Double-A Erie since being activated from the 7-day injured list May 29, covering two innings and striking out a batter while allowing one earned run on three hits and one walk.
Guenther opened the season on Erie's IL while he continued his recovery from the Tommy John surgery he underwent last April. Approximately 13 months after going under the knife, Guenther made his return to game action May 9, when he he began a rehab assignment with Single-A Lakeland. After six appearances at Lakeland, the Tigers saw enough from Guenther to advance him to their Double-A affiliate.
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Tigers' Sean Guenther: Outrighted to Triple-A
Rotowire
Guenther (elbow) cleared waivers and was outrighted to Triple-A Toledo on Tuesday.
The 27-year-old finished the season on Detroit's 60-day injured list but won't be added back to the 40-man roster for the offseason. Guenther underwent Tommy John surgery in April and is likely to miss at least the first half of the 2023 campaign.
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Tigers' Sean Guenther: Throwing off flat ground
Rotowire
Guenther (elbow) has resumed throwing off flat ground from 75 feet and is expected to be ready to pitch off a mound by the end of spring training, Evan Petzold of the Detroit Free Press reports.
After scooping Guenther up off waivers from the Marlins on Nov. 2, the Tigers immediately moved him to the 60-day injured list. He'll likely remain on IL for much of the first half of the 2023 campaign, as he's in the early stages of his throwing progression following his Tommy John surgery last April.
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Tigers' Sean Guenther: Scooped up by Detroit
Rotowire
The Tigers claimed Guenther (elbow) off waivers from the Marlins on Wednesday.
Detroit will immediately move Guenther to its 60-day injured list, where he'll open the 2023 season while he continues to recover from the Tommy John surgery he underwent in April. The 26-year-old southpaw's lone big-league action to date came in 2021, when he yielded a 9.30 ERA and 2.02 WHIP in 20.1 innings out of the Miami bullpen.
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Marlins' Sean Guenther: Undergoes Tommy John surgery
Rotowire
Guenther underwent Tommy John surgery Thursday, Jordan McPherson of the Miami Herald reports.
Reports emerged last week that Guenther would need surgery, though exactly what type of procedure he'd need wasn't specified. Tommy John surgery rules him out for all of this season plus a fair portion of next year as well.
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Marlins' Sean Guenther: Placed on 60-day IL
Rotowire
Guenther (arm) was placed on the 60-day injured list Sunday, Christina De Nicola of MLB.com reports.
Guenther was diagnosed with an arm injury recently that will likely require surgery, and the southpaw will be unavailable for at least the first two months of the regular season. He made his major-league debut last year and posted a 9.30 ERA and 2.02 WHIP in 20.1 innings across 14 relief appearances. It's not yet clear when he'll be able to return to game action.
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Marlins' Sean Guenther: May need surgery
Rotowire
Guenther is dealing with an arm injury which will likely require surgery, Christina De Nicola of MLB.com reports.
The nature of Guenther's injury and his potential surgery are not yet clear, but he's been ruled out of contention for the Opening Day roster and will begin the season on the injured list. While the Marlins would certainly prefer him to be healthy, he wasn't shaping up to be a major part of the team's plans, as he struggled to a 9.30 ERA while striking out just 14.6 percent of opposing batters in his 20.1-innings debut last season.
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Marlins' Sean Guenther: Shelved with back injury
Rotowire
The Marlins placed Guenther on the 10-day injured list Sunday with an upper-back strain, Christina De Nicola of MLB.com reports.
Guenther's move to the IL clears a spot on the active roster for pitcher Pablo Lopez (shoulder), who was reinstated from the 60-day IL ahead of his scheduled start Sunday against the Phillies. Over 14 relief appearances with Miami spanning 20.1 innings, Guenther was lit up for 21 earned runs on 31 hits and 10 walks.
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Marlins' Sean Guenther: Rejoins Marlins
Rotowire
The Marlins recalled Guenther from Triple-A Jacksonville on Saturday, Christina De Nicola of MLB.com reports.
The lefty was sent down Monday after appearing in two games, allowing four runs over 2.2 innings in the second one. Given his poor performance, Guenther figures to pitch in nothing more than extremely low-leverage situations, if at all.
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Marlins' Sean Guenther: Sent down Monday
Rotowire
Guenther was optioned to Triple-A Jacksonville on Monday, Christina De Nicola of MLB.com reports.
Guenther spent a week in the Marlins' bullpen after his contract was selected last Sunday, but he'll head back to the minors after he allowed four runs in 2.2 innings in Sunday's loss to the Rockies. Left-hander Shawn Morimando's contract was selected from Triple-A Jacksonville as part of a move to take his place in the bullpen.
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Marlins' Sean Guenther: Contract selected by Miami
Rotowire
Guenther had his contract selected by the Marlins on Sunday, Christina De Nicola of MLB.com reports.
Guenther has split the season between Double-A Pensacola and Triple-A Jacksonville, and he'll now receive his first taste of the big leagues. The 25-year-old posted a 1.02 ERA and 26:3 K:BB over 17.2 frames at Double-A, but he's struggled since being promoted to Triple-A with a 4.76 ERA, 1.10 WHIP and 28:4 K:BB across 22.2 innings.
