Authors: Jianbei An and Charles Eaton Title: Nilpotent blocks of quasisimple groups for odd primes Abstract: We investigate the nilpotent blocks of positive defect of the quasisimple groups for odd primes. In particular, it is shown that every nilpotent block of a quasisimple group has abelian defect groups. A conjecture of Puig concerning the recognition of nilpotent blocks is also shown for these groups. Status: preprint (submitted for publication)