Rex Ryan says Wednesday that McKnight, whose role on offense has been limited this season, has ''everything you look for in a corner.'' McKnight, who played the position in high school, practiced at cornerback in Week 2 when Revis was sidelined by a concussion.
Ryan first mentioned the idea of using McKnight in the secondary in the running back's rookie season in 2010.
Revis tore the anterior cruciate ligament in his left knee at Miami on Sunday, and will be replaced by Kyle Wilson as a starter. The athletic McKnight gives Ryan another option in the secondary.