  The Sivers Function is briefly reviewed and the Collins Fragmentation
Function to produce a hadron from a polarized quark is defined. We estimate
$\pi^{+},\pi^{-}$ +X production, where X represents particles which are not
detected, via proton collisions with a polarized proton target using the
Collins Fragmentation Function derived using the gluon distribution functions
for polarized p-p collisions at E=$\sqrt{s}$=200 GeV.
