"The training staff thought it would be best to skip this start," Clemens said. "Three days ago is when I felt it. The skin was getting a little sensitive. It swelled up, got a little fat and it turned into a little bit of a blister. Before we rip it open and split it, we thought it would be best to give it a couple of days."
Clemens is 4-4 with a 5.91 ERA. Right-hander Lucas Harrell replaced Clemens in Sunday's 7-2 loss.
"It's tough," Clemens said. "It's tough having to have someone pick you up today. I pride myself on staying away from that DL and missing time. ... But instead of missing three or four starts, go ahead and miss one and hopefully finish the season."