We report measurements of the longitudinal double spin asymmetry for inclusive jet production using polarized p+p collisions at sqrt{s} = 200 GeV at RHIC. Results from the 2005 and 2006 runs are presented. These results set substantial new constraint
s on the polarized gluon distribution in the proton over the kinematic range 0.02 < x< 0.3, when compared to next-to-leading order global analyses of DIS data. The first measurement of the transverse single-spin asymmetry for inclusive jets at mid-rapidity is also presented.
