GLENDALE, Ariz. -- A person with knowledge of the situation says Arizona Cardinals starting right tackle Bobby Massie has been suspended for three games for violating the NFL's substance abuse policy.

The person, who asked not to be identified because the suspension has not been officially announced, says the suspension has been appealed.

Massie, entering his fourth season in the NFL, started every game at right tackle for Arizona last season. He was listed as first-team right tackle on the Cardinals depth chart released on Monday, backed up by first-round draft pick D.J. Humphries.

Bradley Sowell is listed as the backup to Jared Veldheer at left tackle, and guard Earl Watford could also get a chance to audition at tackle.

Massie is in the final year of his contract. According to NFL.com's Ian Rapaport, the suspension is the result of an incident from Super Bowl week, when Massie was reportedly arrested for being intoxicated and asleep behind the wheel of his vehicle.

The suspension first was reported by ESPN.

Cardinals coach Bruce Arians suggested Tuesday that Humphries is very much a work in progress in his first NFL training camp.