Original: The San Francisco Giants are the only franchise to see four players reach the milestone while on their roster: Mel Ott while the team was in New York, Willie Mays, Willie McCovey, and most recently Bonds.
Simplified: The San Francisco Giants are the only franchise to have four players reach 500 home runs while on their roster: Mel Ott while the team was in New York, Willie Mays, Willie McCovey, and most recently Bonds.