Pitcher Brian Bannister landed on the disabled list yesterday, despite a positive diagnosis about the right hamstring strain he suffered Wednesday in San Francisco. "Any time you have to be helped off the field, you're not going to make your next start," Willie Randolph said. The Mets recalled outfielder Victor Diaz from Triple-A Norfolk. He is expected to remain with the club through Monday, after which the Mets plan to summon a minor-league pitcher to take Tuesday's start against the Nationals at Shea.