Jeff Karstens attempted to battle through a left groin strain on the mound on Friday in Milwaukee, but the decision proved to be costly to the club.

During the five days of rest, Karstens worked with the Pirates staff and recreated game adrenaline to test out the injury. The right-hander shortened his side session in order to not aggravate it. He was also monitored and said he was fine to take the ball against the Brewers tonight. After exiting the 25th with the groin injury after seven-plus innings, Karstens was only able to retire a batter tonight, which eventually hurt the club as they fell 9-3.

From the get-go, it looked as if Karstens wasn't quite himself.

Nyjer Morgan lead off the bottom of the first inning with a double ripped down the third baseline. Rickie Weeks followed ...

To continue reading the rest of this article, subscribe to Pirates Prospects. Subscribers get access to every article on the site, along with all of our exclusive live coverage of the Pirates' minor league system, all for a very low monthly or yearly rate.

If you're already a member, you can log in below. If you think you're receiving this message in error, please e-mail tim@piratesprospects.com.