After exhibiting some serious control issues during his start Tuesday night against the Seattle Mariners, Houston Astros right-hander Scott Feldman left the game in the third inning with shoulder discomfort.

MLB.com's Chandler Rome reported that Feldman said the pain in his shoulder increased as the game wore on, to the point where he beckoned for trainer Nate Lucero and manager A.J. Hinch to pay him a visit on the mound.

As a result, Feldman is scheduled to have an MRI on Wednesday to determine the severity of the injury.

Said Feldman to Rome: "It felt tight at the beginning of the game, but once I started feeling where it was actually starting to hurt ... you have to try to know the difference between just tightness and putting yourself and the team in a bad position. Once it started hurting, I don't want to go out there and tear my shoulder, or something like that."

Feldman has been a key contributor for the Astros recently, posting a sparkling 1.33 ERA in his four starts in August. Obviously, the team would prefer not to lose him for the rest of the season, nor would he like to miss out on their playoff push: "You never want to have any shoulder problems, especially with the team playing this well and fighting for the playoffs," Feldman said to Rome. "Hopefully I can get back out there pretty soon ... It's just one of those things, part of baseball. You go through ups and downs."

In 2015, Feldman is 5-5 with a 3.90 ERA in 18 starts, having thrown just over 108 innings of work.

(h/t MLB.com)