When Barry Bonds hits home run No. 715 and moves into second place on the all-time list behind Hank Aaron's No. 755, the fan who retrieves the ball might have a difficult time proving it's the real thing. That's because MLB won't authenticate any of the baseballs San Francisco are using. "He's not approaching the record," said spokesman Pat Courtney by way of explanation. "We will revisit doing the ball authenticating when he approaches the record."