Wallace (hamstring) is expected to play in Denver's preseason finale against Arizona on Sunday, Aric DiLalla of the Broncos' official site reports.
A hamstring injury kept Wallace out of Denver's first two exhibition contests, but he was able to return to practice this week and appears set to get some reps in the preseason finale. After starting nine of the 16 regular-season contests in which he appeared with Pittsburgh last year, Wallace joined Denver as a free agent in the offseason. He's competing with Damarri Mathis and Riley Moss for a starting role at cornerback opposite Patrick Surtain.