ANAHEIM -- The Angels sent rookie pitcher Tyler Chatwood to Triple-A Salt Lake on Friday to make room for Mike Trout on the team's 25-man roster.

The 21-year-old right-hander -- who had been the youngest player in the American League this season until Trout's callup -- was 5-5 with a 3.62 ERA through 17 starts. Part of the reason for the move was that Chatwood was not slated to make any more starts for the Angels before the All-Star break, said manager Mike Scioscia, leaving him with a long inactive period if he were to stay on the big league roster.

He'll be called back up following next week's Midsummer Classic.

"I think it's good for him to stay fresh and get a start in Triple-A, which he wouldn't get here because of the All-Star break," Scioscia said. "We're excited about where Tyler is, and we just think it's a better maintenance program for him right now."

Chatwood is expected to throw a bullpen session on Saturday, and then start for the Bees at Tacoma on Thursday.

Center-field job still belongs to Bourjos

ANAHEIM -- Mike Trout will likely be starting in center field through the Angels' weekend series with Seattle, after Peter Bourjos strained his right hamstring on Thursday night.

But when Bourjos is healthy again, he will still own the starting job, manager Mike Scioscia said. Bourjos' MRI revealed no significant damage, but general manager Tony Reagins said, "It's safe to say that he won't be playing this weekend."

Bourjos, a legitimate Gold Glove Award candidate in his first full Major League season, suffered the injury while rounding second during his eighth-inning double in Thursday's game. Besides playing spectacular defense all season, the 23-year-old's bat has come on particularly strong of late -- he was hitting .341 since June 1 after struggling in May (.176).

"Peter's starting to do some of the things that made us excited about him in the Minor Leagues last year," Scioscia said. "His advancement is really exciting to watch. Peter's real value to us is as a defensive center fielder, he's been playing a better defensive center field than anybody in our league. We'll evaluate things when Peter's ready, as to what kind of look we'll have in our organization. We want Peter back in the lineup."

Reagins said that the Angels would be cautious to not rush Bourjos' return.

"Peter's feeling better than he felt last night," Reagins said. "We're optimistic about Peter and his recovery. Hamstrings can be tricky, you want to give it as much time as it needs to heal and heal correctly."