Pearl never competed for the IFBB, despite Weider brothers' invitations. And maybe that upset them. Arnold also challenged all american champions in the Weider's magazines. Bill accept the challenge in 1971, but outside the IFBB's rules and judges. 1971 NABBA being fair for both, as champions of this contest. And yes,looking back, in 1971 Arnold was better than Bill. But about one month before the contest, in the photos published by Leo Stern, Bill was huge and cut. Sergio also looked bigger than ever in Arthur Jones's late photos.. And that probably scared Joe.
Bill was guest poser at the 1978 IFBB MO, if I remember well.