  We compute the leading non-analytic quark mass dependence of the matrix
elements of isovector twist-2 operators between octet baryon states in quenched
QCD using quenched chiral perturbation theory. There are contributions of the
form m_q log m_q, in analogy with QCD, but there are also contributions of the
form log m_q from hairpin interactions. The nucleon does not receive such
hairpin contributions.
