Carolina Panthers backup defensive end Frank Alexander was suspended without pay for the first four games of the NFL season for violating the league's substance-abuse policy.

Alexander is eligible to return to play Sept. 29 following the Panthers' game against the Ravens.

A fourth-round draft pick out of Oklahoma in 2012, Alexander had 15 tackles and one sack last season in a dozen games and three starts.

He had 2.5 sacks as a rookie

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Aaron Wilson covers the Ravens for The Baltimore Sun