"Left-hander Scott Olsen said the "tightness" he felt in his right ankle Sunday would not keep him from making his start Thursday.

Olsen tweaked the ankle covering first base on Carlos Delgado's grounder in the fifth inning Saturday. Unsure exactly how he hurt it, Olsen said he tagged the base with his glove. Somewhere in the process of collapsing on the bag, he took a misstep. Olsen was slow to get up and gingerly walked to the dugout.

Sunday, Olsen was able to throw off flat ground, but he was noncommittal about today's scheduled bullpen session. Olsen said he would not have been able to throw off a mound Sunday.

"I don't have to worry about that yet," Olsen said. "A bullpen is not that big of a deal right now."

Durability has never been an issue with Olsen. In 2005, he missed a month in the minors with an elbow problem, but since his first full big-league season in 2006, he has not missed a start.

"I don't miss starts," he said. "My arm's not broken.""