Rob Johnson (born March 18, 1973 in Newport Beach, CA) is a former quarterback from USC who played for the Jacksonville Jaguars, Buffalo Bills, Tampa Bay Buccaneers, Washington Redskins, and Oakland Raiders until 2004. Johnson joined the NFL in 1995 and is currently a coach at Camp Quarterback, a program run by Rob's father Bob that has produced players such as Heisman Trophy winner Carson Palmer.

Rob Johnson holds the NFL record for most sacks per passing attempt, earning the nickname "robo-sack" due to his reluctance to throw the ball away. However, Johnson also holds the Buffalo Bills franchise record for completion percentage and pass-to-interception ratio, besting the likes of Jack Kemp and Jim Kelly.

In a regular season game in 2003 vs the Buffalo Bills, Rob Johnson, then a member of the Washington Redskins, was called into the game after the starting quarterback Patrick Ramsey was injured. He entered the game with a chorus of boos from the crowd at Ralph Wilson Stadium, and on the second play, he was sacked by Aaron Schobel, sending the crowd into a frenzy.