ST. PETERSBURG, Fla. (AP) -- Tampa Bay Rays minor league pitcher
Matthew Walker has been suspended 50 games by major league baseball after testing positive for an amphetamine listed among baseball's banned performance-enhancing substances.
Walker was taken by Tampa Bay in the 10th round of the 2004 amateur draft. The 21-year old right-hander has appeared in 22 games for Class-A Vero Beach this season, going 4-and-7 with a 4.86 ERA.
The suspension takes effective immediately.
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