Kirk Ferentz said both players were guilty of violating team policy and would sit out the Sept. 2nd opener in Kinnick Stadium.
Kenneth Iwebema, a 6-4, 270-pounder from Arlington, TX, was a first team all-Big Ten choice a year ago. He has been named to numerous 2006 pre-season all-America watch lists.
Herb Grigsby, a 6-0, 175-pounder from Mayflower, AR, started three games last year and entered fall practice as one of Iowa's two starting receivers.