The Toronto Blue Jays, who have been adding to their bullpen might be without Dirk Hayhurst when the season starts.
The club announced on Wednesday that Hayhurst will undergo exploratory arthroscopic surgery on his sore right shoulder.
The 28-year old injured his shoulder while getting ready for the upcoming season. The right-hander appeared in 15 games with the Blue Jays in 2009, and posted a 0-0 record with a 2.78 ERA.
Hayhurst's estimated return to action will not be available until following the surgery, which will take place in Cleveland.