"Detroit Lions defensive tackle Ndamukong Suh and Pittsburgh Steelers linebacker James Harrison could face substantial suspensions -- including playoff games -- if they repeat the transgressions that led to their recent suspensions, according to a league source.

Harrison was suspended Tuesday for Pittsburgh's game against the 49ers on Monday for a helmet-to-head hit on Browns quarterback Colt McCoy. NFL Network insider Jason La Canfora reported Harrison has requested an expedited hearing and a date has been set for his appeal on the league-issued discipline that also will cost him a game check.

Suh returns this week from a two-game suspension -- which he appealed and subsequently lost -- for pushing on the head and stomping on the arm of Packers offensive lineman Evan Dietrich-Smith. The Lions went 1-1 in Suh's absence.

The source indicated that there might not be much latitude for Suh and Harrison in the future since they've been warned and fined for previous infractions but still have pushed things to the point of suspensions. Harrison was fined six times from 2009 to '10."