TEMPE, Ariz. -- Mike Trout is heading into the 2013 season with a new position and a new weight.

On Thursday, shortly after getting his physical exam, the 21-year-old leadoff hitter, and new left fielder, came in about 10 pounds heavier, at 240. It was a stark difference from last spring, when a nasty virus prompted Trout to lose more than 10 pounds.

"You know, my weight fluctuates," Trout said. "During the course of Spring Training, I'll lose probably five to 10 pounds. So, where I need to be to start the year, I felt like coming in heavier and then getting down my weight to start the year. I know where I need to be."

Asked if he expected it to alter his all-out, aggressive playing style, Trout said: "Nah. I feel great, look forward to the spring and got to get on the right path. Like I said, I have just one thing on my mind -- get to the postseason, come together, have fun."

After robbing four home runs and posting a 10.6 Ultimate Zone Rating in center field, Trout will switch to left to make room for Peter Bourjos -- a move that will improve the Angels' defense and also help keep Trout's legs fresh.

Without question, Trout would prefer to play center field. But he took the high road when asked about the move.

"Whatever it takes to win, I'll do it," Trout said. "I played a little bit of left last year. It's tough to get used to at first, but I'm sure playing every day, I'll get used to it."