Al Davis and the coaching staff face harder cuts this offseason as they attempt to improve the 53-man roster. Below is a projection of the roster locks and bubble players: Comment here, on Twitter or on Facebook . QUARTERBACKS (4, will keep 3) Locks: Jason Campbell, Bruce Gradkowski Bubble: Kyle Boller , Charlie Frye RUNNING BACKS (8, will keep 5 or 6) Locks: Darren McFadden, Michael Bush Bubble: Marcel Reece, Rock Cartwright, Michael Bennett, Luke Lawton, Manase Tonga, Chane Moline WIDE RECEIVERS (12, will keep 5 or 6) Locks: Darrius Heyward-Bey, Louis Murphy, Chaz Schilens, Jacoby Ford Bubble: Johnnie Lee Higgins, Todd Watkins, Jonathan Holland, Nick Miller, Yamon Figurs, Shaun Bodiford, Paul Hubbard, Damola Adeniji TIGHT ENDS (4, will keep 3) Locks: Zach Miller, Brandon Meyers Bubble: Tony Stewart, John Owens OFFENSIVE LINE (15 will keep between 9 or 10) Locks: Mario Henderson, Langston Walker, Khalif Barnes, Bruce Campbell, Jared Veldheer, Robert Gallery, Samson ...