Buffalo, N.Y. ? Troubled Buffalo Bills defensive end Anthony Hargrove was suspended for four games without pay by the NFL on Saturday for violating the league’s substance-abuse policy.

In announcing the suspension, the league did not say what banned substance Hargrove tested positive for. Under league rules, players face a minimum four-game suspension for the first positive test, followed by an eight-game suspension for second-time violators.

Bills spokesman Scott Berchtold declined comment, citing a confidentiality clause that’s included in the substance-abuse policy. Hargrove’s agent, Philip Williams, did not immediately return a message.

The suspension is the latest problem for Hargrove after the third-year NFL player was arrested and charged with three misdemeanors stemming from a confrontation with police outside a Rochester nightclub last weekend.

Hargrove pleaded not guilty to the charges and also apologized to fans and his teammates, saying: “I need to hold myself up better than this. … It’s time for me to be a man and take responsibility in myself.”