Lions' Jerome Harrison to miss 2012

ALLEN PARK, Mich. -- The Detroit Lions placed running back Jerome Harrison, who had surgery last October for a brain tumor, on the reserve/non-football illness list Tuesday.

By being placed on the list, Harrison is ineligible to play in 2012. The move gave the team the space under its 90-player roster to sign defensive back Sam Proctor and wide receiver Wallace Miles, who were undrafted this year and had tried out for the Lions during last-weekend's rookie minicamp.

Harrison's agent, Mitch Frankel, told the team's website that his client is "progressing" after having the tumor removed.

Harrison's tumor was discovered in a physical exam after the Lions attempted to trade him to the Philadelphia Eagles last season for running back Ronnie Brown.

Information from The Associated Press was used in this report.