  We study decay rates and spectra of anti-B --> Lambda anti-p pi, Sigma0
anti-p pi, Sigma- anti-n pi, Xi0 anti-Sigma+ pi, Xi- anti-Sigma0 pi and Xi-
anti-Lambda pi modes under a factorization approach. The baryon pairs are
produced through vector, axial vector, scalar and pseudoscalar operators.
Previous predictions, including ours, are an order of magnitude too small
compared to experiment. By incorporating QCD counting rules and studying the
asymptotic behavior, we find an earlier relation between the pseudoscalar and
axial vector form factors to be too restrictive. Instead, the pseudoscalar and
scalar form factors are related asymptotically. Following this approach, the
measured Lambda anti-p pi rate (~4.0x10^{-6}) and spectrum can be understood,
and Lambda should be dominantly left-hand polarized, while we expect Br(Sigma0
anti-p pi)~1.6x10^{-6}. These results and other predictions can be checked
soon.
