Jerome Simpson is facing a three-game suspension from the NFL.
The Vikings wide receiver missed Monday's practice to appeal the suspension, which stems from a drunken-driving arrest last season.
Simpson was in New York with his lawyer, David Valentini, for a disciplinary hearing, Valentini said.
Simpson, 28, avoided jail time in January after pleading guilty to careless driving and third-degree drunken driving following a Nov. 9 arrest on Interstate Hwy. 394. He was placed on a one year probation and ordered to perform 120 hours of community service in public schools.
The Vikings re-signed the wide receiver in the offseason on a one-year deal for the third consecutive season despite a possible suspension. When the team signed Simpson in 2012, he faced a three-game suspension by the NFL following a drug arrest in September 2011, when he played for Cincinnati.
Simpson was indicted on a felony drug-trafficking change, but later pleaded to a lesser felony charge of "being involved in a prohibited act relating to controlled substances." He was sentenced in Kentucky to 15 days in jail in April 2012.
Simpson had a career-high 726 receiving yards on 48 receptions with one touchdown last season with the Vikings. He had one catch for 19 yards in the Vikings' 30-28 victory over the Cardinals on Saturday night.
Cassel to start
Coach Mike Zimmer announced Matt Cassel will start at quarterback against the Chiefs on Saturday, but Teddy Bridgewater could also play with the first team.