Melton (concussion) is active for Sunday's game against the Rams, Darren Urban of the Cardinals' official site reports.
Melton entered concussion protocols following Arizona's Week 1 loss to Buffalo. He started as a DNP on Wednesday, but he finished the week as a full participant in Friday's session, and he is good to go for Sunday's NFC West showdown. Melton played 27 snaps (10 on defense, 17 on special teams) and registered two solo tackles against the Bills in Week 1.