New England Patriots linebacker Jerod Mayo and running back Stevan Ridley are out for the season with knee injuries.
Mayo injured his right knee.
Ridley tore his anterior cruciate and medial collateral ligaments.
Mayo got hurt during the second quarter of a win over the Buffalo Bills.
Ridley got hurt on a running play in the third quarter. He has rushed for 340 yards and two touchdowns.
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Aaron Wilson covers the Ravens for The Baltimore Sun