Carlson underwent an MRI on Monday, which revealed the irritation but also indicated there was no structural damage to his throwing shoulder. His doctor recommended at least seven days of inactivity to allow time for the pain to subside.
The 30-year-old informed the Blue Jays of the discomfort he was feeling following his Grapefruit League debut on Saturday. During that game against the Tigers, Carlson struggled with his control, allowing two earned runs on one hit and two walks in one inning of work.
2010 Spring Training - null
Sights & Sounds
Spring Training Info
Carlson spent the vast majority of his 2010 campaign pitching for Triple-A Las Vegas, but he does have two full seasons in the Major Leagues under his belt. In '08, he went 7-2 with a 2.25 ERA with 55 strikeouts over 60 innings. He regressed the following year, but still managed to throw 67 2/3 innings while posting a 4.66 ERA.
The native of Connecticut entered Spring Training competing for one of the final two spots in the bullpen. He is up against David Purcey, Casey Janssen, Carlos Villanueva, Josh Roenicke and potentially any of the starter candidates who do not make the rotation.
Farrell acknowledged those type of competitions sometimes cause pitches to overdo it during the initial stages of Spring Training in an effort to make an early impression.
"I would say that can be the case," Farrell said. "I don't think Jesse was not revealing something. He knows and it was outlined to him that he is in competition for one of those spots.
"He came in here and is in here competing daily. In his mind, and certainly in camp, this is a little bit of a setback -- but not going to completely rule out something for Opening Day."