Pittsburgh signed Agnew to its practice squad Tuesday, Teresa Varley of the Steelers' official site reports.
Agnew actually tried out with Pittsburgh back before its regular-season opener, and he's now being brought on board ahead of Week 11. The Steelers already have six healthy wideouts on their active roster, but Agnew's experience as a returner could help his case to be elevated as the second half of the year plays out.