Lock (heel/elbow) is no longer using a walking boot and may be available as the emergency No. 3 quarterback for Sunday's game against the Ravens, Jordan Raanan of ESPN.com reports.
Giants coach Brian Daboll said Wednesday that Tommy DeVito is expected to start Sunday's game, although Lock still is considered the starter when he's healthy. Tim Boyle likely will be elevated from the practice squad as the No. 2 QB, with Lock only available on an emergency basis but then potentially returning to the starting job Week 16 or 17.