The decision to promote Mike Trout was based solely on Peter Bourjos' hamstring injury. In other words, it's completely unclear if Trout will remain in the majors following Bourjos' return. The Angels are unsure if Bourjos will require a stint on the disabled list. Regardless, Trout should get the start in center field for all three of Los Angeles' games against the Mariners this weekend, and if he starts out with a bang, it's hard to envision him being sent back to Double-A by a team in a dogfight for the American League West.

With Peter Bourjos hobbled by a hamstring injury, the Angels will promote Double-A Arkansas' Mike Trout for Friday's game. The No. 2 prospect by Baseball America, Trout is a five-tool player with tremendous upside. He carries a .330/.422/.544 Double-A batting line this season, along with nine homers and 28 steals. His short-term staying power will hinge on two potential hurdles: starting every day in a crowded outfield, and transitioning from Double-A to major league pitching. But the Angels would not promote him just to sit on the bench. Expect some rough patches here and there, but in the long term he is a must-have in any keeper league.