Willie McCovey Signed San Francisco Giants 500 Home Runs Cachet Envelope- PSA 10This autographed cachet envelope has been personally hand signed by Willie McCovey of the San Francisco Giants. This autograph is certified by PSA (Professional Sports Authenticators). It comes encapsulated and authenticated by PSA in the plastic case. PSA has graded the autograph as Gem Mint 10! Willie was a fearsome left handed power hitter, at the time of his retirement in 1980, McCovey ranked second only to Babe Ruth in career home runs among left