Gonzalez says the injury is "nothing to worry about" but he's sitting out as a precaution. He says he could be back on the field as soon as Wednesday.
Gonzalez felt the problem a few days ago in Philadelphia. He had the same injury last year while playing for Toronto. He didn't miss any games that time and says he "knows how to control it: play hard but play smart."
Meanwhile, pitcher Derek Lowe threw his normal side session and had no problems. He came out of his last start with a large blister, but plans to make his next scheduled start Thursday.