The leg whip occurred in the third quarter of the Panthers' 24-20 victory over the Patriots on Monday night. Johnson got through Cannon's block on a run play and Cannon fell down. He then swung his left leg and hit Johnson in the right knee. Cannon was not penalized on the play.
Cannon apologized to Johnson for the incident.
FARRAR: The Playbook: Previewing Broncos-Patriots, Colts-Cardinals, more Week 12 games Johnson was diagnosed with a mild medial collateral ligament sprain and he will not play in this Sunday's game against the Miami Dolphins.