Coach Bruce Arians said Monday that Darden has entered concussion protocol, Scott Smith of the Buccaneers' official site reports.
Darden racked up 66 kick-return yards before being knocked out of Sunday's 38-31 win over the Colts. If he is unable to clear concussion protocols before Week 13 at Atlanta, then Giovani Bernard is expected to handle kick-return duties, while Scotty Miller would likely handle punt returns.