McKenzie (concussion) participated in Thursday's practice in a red non-contact jersey, Alaina Getzenberg of ESPN.com reports.
McKenzie was listed as a non-participant Wednesday, but his presence on the field Thursday gives him a chance to suit up Sunday against the Steelers. To do so, however, McKenzie will need to pass all five stages of the NFL's concussion protocol. Given that he sported a non-contact jersey in his return to practice, it's safe to assume McKenzie has a few steps left to clear.