The Los Angeles Angels will be without their ace this weekend as they take on the Detroit Tigers. Jered Weaver, who had been battling shoulder discomfort for a couple of starts, underwent an MRI and has been diagnosed with shoulder tendinitis.

According to the Angels, Weaver will not make his scheduled start on Friday night and will likely pitch sometime next week. The team will announce his next scheduled start over the weekend.

The loss of Weaver is a substantial one for Los Angeles. The 29-year-old starter has been terrific this season, posting a record of 16-4 and a 2.86 ERA. The Angels entered Thursday 7.5 games back of the Rangers in the American League West and just 2.5 back of the second wild card spot, and they'll need their ace healthy if they hope to make a run in September.

The club is expected to announce their starter for Friday night's game sometime this afternoon.

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