An online petition for the NFL to retire former Arizona Cardinals player Pat Tillman's No. 40 is gaining steam.
The petition, recently started at change.org, calls on the NFL to retire Tillman's number league-wide.
The petition was started by Sean Wilson and surpassed 10,000 signatures on Wednesday.
Tillman died in a friendly-fire incident in Afghanistan just over 17 years ago. He had joined the Army after the Sept. 11, 2001 attacks.
Wilson wrote in the petition that it was his goal to see Tillman honored by the NFL with the uniform number retirement as we approach the 20th anniversary of 9-11.