SAN FRANCISCO (AP) — The San Francisco Giants are hoping a recent division rival can turn them back into a contender. Bob Melvin, a Bay Area native and former Giants player who also managed a decade in Oakland, was formally announced as San Francisco's new manager Wednesday. That completed a whirlwind few days in which the Giants received permission to interview him from the division rival San Diego Padres, where the veteran skipper had one more year on his contract.