 On August 25, 2013, the Buffalo Bills traded linebacker Chris White for Lewis, due to the mounting quarterback injuries for the Bills.He was released on August 31, 2013 and signed to the practice squad September 1.On October 7, 2013, coach Doug Marrone announced on WGR Sports Radio 550 that Lewis was promoted to the active roster from the practice squad after an injury to E. J. Manuel and started week 6 against the Cincinnati Bengals, over undrafted rookie Jeff Tuel, where he went 19/32 for 216 yards with 2 passing touchdowns and 0 interceptions and added 7 carries for 17 yards and 1 rushing touchdown.