Injury report: Mike Jenkins leaves practice to have an MRI on his back

Cornerback Mike Jenkins was added to the injury report Thursday after leaving practice with a back injury. The Cowboys sent him for an MRI.

He played 28 of 67 plays in Sunday's game against the Falcons, with one pass defensed.

Running back DeMarco Murray (foot) and defensive tackle Jay Ratliff (ankle) were held out of practice again, along with defensive lineman Sean Lissemore (ankle), safety Matt Johnson (hamstring) and center Phil Costa (ankle).

Linebacker Dan Connor (neck) was limited in practice, while receiver Dez Bryant (hip) and running back Felix Jones (knee) were full participants.