The Braves seek to add a shortstop this offseason, but not to give Dansby Swanson more development time as some have speculated. Rather, they’re looking for a proven shortstop who can back up several positions around the infield, a need because Johan Camargo could end up playing an everyday role at third base instead of serving as a utility man. That need grew more pressing after versatile veteran Danny Santana and former second baseman-turned-utility player Jace Peterson both became non-tendered free agents Friday when the Braves didn’t offer them arbitration. Santana and Peterson each was expected to make just over $1 million through arbitration and the Braves sought upgrades in production. The Braves appear set at three infield spots with cornerstone Freddie Freeman at first base and youngsters Ozzie Albies at second and Swanson at shortstop. While new general manager Alex Anthopoulos isn’t married to any previous plan the Braves had, he made it clear in his first day on the job last month that he didn’t plan to blow in and make abrupt, sweeping changes. According to a person close to the situation, Anthopoulos won’t guarantee a spot for any young player just because of current or former prospect status, but the Braves have some players that Anthopoulos and the team are counting on to be everyday players including Albies and Swanson.