The theme of the day on Tuesday at Camelback Ranch, where Dodgers pitchers and catchers reported for duty, officially, for the first time, was a mathematical one. Specifically, which of the eight starting pitchers under contract will be a part of the five-man rotation for the season.

Manager Don Mattingly was asked who his fifth starter was, but the skipper hasn't even gotten that far, at least in his readiness to reveal his preferred rotation order.

"Who is our fifth starter? Who's our fourth?" Mattingly asked. "We have eight guys who will be working as starters in camp. We'll see how it goes."

Two of the eight pitchers are recovering from injuries. Chad Billingsley avoided surgery to correct his partially torn ulnar collateral ligament in his right elbow, hoping instead that platelet-rich plasma will do the trick. Ted Lilly is coming off left shoulder surgery, and hasn't pitched since May.