Yes, Barger is considered better suited for 3B due to his arm but can play average'ish SS. This is based on a BA report from last week.
edit - its from MLB.com
Barger’s arm has been his best tool since his senior year of high school, and while he plays a solid shortstop, he profiles best at third base, where he can really put his throwing to good use. He also has some experience at second base, helping his cause as a potential power-heavy utility infielder if he can’t nail down an everyday spot at third.