Will Carroll responses to yesterday's post on Randy Johnson in his Under the Knife column (subscription required). Will points out that it's Johnson's knee that the problem.

From the very first pitch, Johnson was not extending, appearing instead to shorten his stride to reduce stress on that damaged front knee. Watch Johnson’s leg--it’s nearly straight. He’ll either “pop up” on his follow-through, getting taller, or rotate to the third base side. Both actions take the energy that normally heads to the plate in a delivery and redirects it.

So it's an injury causing bad mechanics. Last weekend on Lehigh Valley Yankees Fan Club Radio I was asked what the Yankees were going to do with Pavano when he came back. My semi-joking reply was, "He'll take the place of the next injured starter." Maybe Randy needs a two week vacation to let the knee heal.