I'd hold on to Crabtree and also try to get Lance Moore, if you can dump someone else to do it.
And I'd roll with Bradford for next week's game vs. Seattle.
It helps to list the matchups if you want to get multiple responses/opinions.
12 team H2H league, standard scoring, no PPR.
QB: Cutler, Kitna
RB: All Day AP, CJ2K, F.Jax, R.Brown, S. Greene, Dixon
WR: G. Jennings, Roy Williams, M. Williams (sea)
TE: J. Tamme
K: Hartley, Carpenter