Broncos cornerback Pat Surtain II returned to practice as a full participant on Wednesday, a sign he’s progressing through the league’s concussion protocol and toward a return to game action. Denver head coach Sean Payton said Surtain still has work to do to get cleared, but that his trajectory, “looks positive.” After a full day of work, Surtain is tracking toward returning for Sunday’s home game against Carolina. The All-Pro cover man was concussed on the first defensive play of Denver’s Week 6 home loss to the Los Angeles Chargers on Oct.