Seranthony Domínguez Experiencing Triceps Tightness, to Undergo MRI

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Thomson said Seranthony Domínguez felt some tightness in his tricep this morning, which is why he wasn’t available tonight. They’re going to reevaluate tomorrow
— Alex Coffey (@byalexcoffey) August 21, 2022
The Philadelphia Phillies' bullpen has been a surprising strong suit of the club this season, it's been a major reason why the team succeeded once Bryce Harper went down.
Unfortunately, it appears the backbone of that bullpen, closer Seranthony Domínguez, could be looking at some time off. Manager Rob Thomson announced following Saturday's doubleheader that the electric reliever was dealing with triceps tightness in his throwing arm.
The right-hander has had an unbelievable season, posting a 1.64 ERA across 46 appearances, striking out 54 batters in the process and notching nine saves.
To lose Domínguez would be a massive blow. The Phillies already lost Corey Knebel to a lat strain earlier this week and, while his role was not as vital as Seranthony's, bullpen depth is running thin in the Phillies' upper minors.
Fortunately, this potential injury is new for Domínguez, and is nothing of a recurring nature.
Domínguez will go for an MRI on Sunday morning, and the Phillies will be hoping that the issue is nothing serious. The 27-year-old is the best arm they've got, and they'll need him if they want any hope of making a serious postseason run.
Tyler Cyr, a 29-year-old righty reliever, is joining Phillies today. Awaiting word on Seranthony Domínguez, who was going to be examined this morning. Possible Phillies just shuffle long relievers after doubleheader.
— Matt Gelb (@MattGelb) August 21, 2022
Update: Tyler Cyr has reportedly joined the Phillies and has a locker in the clubhouse. While it could just be a move in regards to yesterday's doubleheader, the Phillies are still waiting to hear the status of Domínguez. A roster move could be incoming.
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Alex Carr is a writer, editor, and podcast host for Sports Illustrated and FanNation's 'Inside The Phillies'. Previously, his work has been featured on SBNation's 'TheGoodPhight'. He/him.