Should I trade Derrick Ward and Donald Driver for Marc Bulger and Tony Gonzales?

14 team head to head league, starting positions: 1 QB, 2 RB, 3 WR/TE, 1 K, 1 DEF with a bunch of bench spots. Right now my RBs are Ward, Travis Henry, Willis McGahee and Tatum Bell. My WRs are Driver, Javon Walker, Vincent Jackson, Mike Furrey and Jerry Porter. My QBs are Jake Delhomme and Brian Griese (Joey Harrington is available also). Right now my record is 3-1. Ward obviously will see a reduction in carries with Jacobs coming back next week, but is the banged up Bulger worth it?