Jul 06, 2007 12:41 PM EST

Tigers infielder Neifi Perez has been suspended 25 games by Major League Baseball for testing positive for a banned stimulant. The suspension was announced Friday morning.

Stimulants were added to MLB's testing program last year in an effort to stop player use of such substances as amphetamines, or "greenies." A first positive test does not trigger a suspension and is kept anonymous, but the player can be tested up to six more times within the next 12 months. A second positive test results in a 25-game suspension.

Perez has been a quietly valuable player on a Tigers team that carries two utility infielders. Though he's batting just .172 (11-for-64) with a home run, three doubles and six RBIs in 33 games, his defense has been solid in spot starts filling in along the left side of the infield. He filled in capably for shortstop Carlos Guillen during a four-game series at Cleveland a month ago, and he made a skilled stop up the middle to start a critical inning-ending double play to preserve Justin Verlander's no-hitter June 12.

Via MLB.com