OK, so he wasn't throwing a baseball, but the right-hander was simulating his motion with a towel in his hand, which pitchers do when they want to do mound work without actually throwing.
For Webb, the towel drill has value because it's been so long since he's thrown off a mound that getting comfortable on one again is a challenge in itself.
"It just helps me to get the feel of the slope of the mound," Webb said. "That's the biggest thing in going from flat ground to the mound. This should help."
So when does Webb think he'll be throwing a ball off the mound again?
"Maybe in a week and a half," he said. "I'm up to throwing three days in a row now."
Webb, who had shoulder surgery in August, has not thrown off a mound since March 4 and last pitched in a big league game on Opening Day 2009.