Philadelphia Phillies pitcher Andrew Painter. Nathan Ray Seebeck-USA TODAY Sports

Phillies’ top pitching prospect Andrew Painter is headed for evaluation after reporting discomfort in his throwing elbow, manager Rob Thomson informed the beat, via Alex Coffey of the Philadelphia Inquirer. He’ll be shut down from throwing pending further testing, writes Matt Gelb of The Athletic.

Thomson declined to provide specifics on the evaluation or a timeline for when the club would have more information. The skipper did suggest he’s at least somewhat alarmed by the situation. “Well, I’m concerned,” Thomson told reporters. “You’re always concerned when guys are sore. We’ll know more after we get the test back.”

It’s an ominous continuation of arm issues that have bothered the right-hander for the bulk of the year. Painter turned heads early in spring training and looked to have a strong chance at securing an Opening Day rotation spot before his 20th birthday. He sprained the UCL in his throwing elbow midway through exhibition play, however, requiring a multi-week shutdown.

That obviously killed any chance of Painter breaking camp. The Phils still held out hope for a midseason return. The 6-foot-7 hurler was scheduled to throw to hitters this week for the first time since March. Once he felt some soreness, they modified that plan to have him throw a bullpen session instead. Painter came out of that with renewed elbow discomfort, necessitating further testing.

With more uncertainty regarding Painter’s timetable for a return to game action, the Phillies could face some urgency to add rotation help in the coming weeks. Gelb reports that the Phils have told opposing clubs they were monitoring Painter’s rehab before deciding whether to turn to the trade market for starting pitching.

Philadelphia has an established front four of Zack Wheeler, Aaron Nola, Ranger Suárez and Taijuan Walker. They’ve rotated through various options in the final spot. Bailey Falter got the first look but struggled to a 5.13 ERA in eight appearances before being optioned to the minors. Matt Strahm got a season-opening rotation job while Suárez was injured. He pitched well, but the Phils have seemingly preferred to use him in the bullpen to keep an eye on his workload.

Left-hander Cristopher Sánchez has had the job of late. The 26-year-old has had a strong month, working to a 2.84 ERA on the back of a massive 55.6% grounder rate through five starts. Whether Sánchez keeps performing at that level could also affect the deadline calculus for president of baseball operations Dave Dombrowski and his front-office staff.

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