ARLINGTON -- Minor-league slugger Joey Gallo will concentrate on third base during spring training, Texas Rangers general manager Jon Daniels and manager Jeff Banister said on Thursday.

Gallo had more starts in left field (14) than at third base (13) while with the club last season. The club has not ruled out a position change, which will become more likely is veteran third baseman Adrian Beltre agrees to a contract extension soon. Until that happens, the Rangers want Gallo to focus on third.

In other developments, non-roster right-hander A.J. Griffin will start camp with no limitations. Griffin made only four minor-league starts in the last two years with Oakland while recovering from Tommy John surgery and a shoulder strain. He was 21-11 with a 3.60 ERA in 47 starts with Oakland in 2012-13.

The contracts for non-roster catchers Mike McKenry and Bobby Wilson each include a late March "out" clause. The provision allows each to leave the organization if he is not going to crack the opening day major league roster.