Buck has agreed to a minor league deal with an invite to spring training with the Braves, MLB.com's Mark Bowman reports. Christian Bethancourt is a defensive savant, but may not be able to reliably hit big league pitching, and his backup, A.J. Pierzynski is 38 and got on base at a .288 clip last year. Buck at least gives the Braves a third option who is ready for the big leagues if the need should arise, although he will probably be sent to Triple-A to start the season.