And the Dodgers need him, because the uncertain status of Ronald Belisario and Hong-Chih Kuo has already changed the makeup of the bullpen, which was one of the team's most potent weapons last year.
But if you've been looking for Sherrill in recent games, you haven't seen him. While manager Joe Torre has been testing most of his relievers in back-to-back games this week, Sherrill hasn't pitched since last Friday and won't pitch again until this Friday.
Instead, he's been throwing bullpen sessions with pitching coach Rick Honeycutt, trying to incorporate corrective action after spotting several mechanical flaws believed responsible for a lack of command and velocity.
"Watching video and making these adjustments seems to have helped a lot," said Sherrill, who has a 5.06 spring ERA with six walks in 5 1/3 innings. "I've gotten a little zip back from the way I've been throwing all spring."
Sherrill said he was turning his landing foot too early and losing torque in his release. The adjustment he made was less of a leg swing as he starts his delivery.
"It still feels a little wierd, because it's just not a habit yet," he said.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.