NEW YORK (AP) Philadelphia Phillies pitcher Daniel Stumpf has been suspended for 80 games without pay by Major League Baseball after testing positive for a performance-enhancing substance.

The suspension was issued Thursday by Commissioner Rob Manfred's office.

Stumpf, a left-handed pitcher in his first major-league season, tested positive for an anabolic steroid used to increase speed and strength. Use of the steroid is a violation of Major League Baseball's Joint Drug Prevention and Treatment Program.

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The suspension begins immediately for the 25-year-old who has appeared in three games this season.