Vicki I. Podberesky, the attorney for Jimmons, said she received a letter Tuesday from the Whitman County prosecutor's office declining to file charges.
Last month, the Washington State University Police Department recommended second-degree felony assault charges against Jimmons.
Video showed Jimmons, running to the locker room, knocking over a fan who had rushed the field at Martin Stadium.
In October, USC coach
The Whitman County prosecutor didn't immediately return a request for comment.