Joey Bart is not making the Giants' Opening Day roster, no matter how well he does this spring in big league camp. It's simple as that.
San Francisco's top catching prospect likely will start the season in Triple-A Sacramento. He might be the Giants' most talented catcher behind Buster Posey, but the backup job will have to go to someone else.
The Giants' battle to be Posey's backup currently consists of 30-year-old Rob Brantly and 28-year-old Tyler Heineman. Both players spent the majority of last season in Triple-A and haven't played many games in the big leagues.