According to Rob Biertempfel on Twitter, Jeff Karstens missed his scheduled bullpen session today due to sore right shoulder. He will still be able to play catch and soft toss. Karstens told him he is “just being smart” and not trying to get hurt by overdoing it early in Spring Training. Stolmy Pimentel also missed his schedule BP. According to Biertempfel, he was a late arrival to camp.
#Pirates Karstens has sore rt front shoulder, not throwing for couple days. "I want to play it smart." He is able to play catch, soft toss.
— Rob Biertempfel (@RobBiertempfel) February 19, 2013
Tom Singer of MLB.com added right afterwards that Karstens will stay off the mound for a couple days
Karstens admits "little soreness" in front of shoulder, will stay off mound for couple days. "Just being smart." #Pirates
— Tom Singer (@Tom_Singer) February 19, 2013
UPDATE 10:02 AM Bill Brink has now posted on Twitter that the injury is tightness in his right bicep(throwing arm) and no MRI has been taken
Karstens has some tightness in right biceps, he said. Will throw from flat ground today. Explains no live BP. Said no MRI taken yet
— Bill Brink (@BrinkPG) February 19, 2013