Robbie Buller, 25, will begin his first season with the Grizzlies in 2015. The right-hander previously spent time in the Arizona Diamondbacks farm system.

The Grizzlies selected Buller with the 20th overall selection in the 2015 Frontier League Draft.

In rookie-ball with the Missoula Osprey, Buller posted a 3.97 ERA in six appearances during the 2013 season. The Texas native played his collegiate ball at Houston Baptist University, shining primarily at the plate.

In three seasons for the Huskies, Buller hit .319 with 26 home runs, 45 doubles and 132 RBIs. He left Houston Baptist ranked in the top ten all-time in home runs, RBI's, hits, runs, and doubles.

Despite seeing limited innings on the mound, the Diamondbacks drafted Buller as a pitcher in the 35th round of the 2012 MLB Draft.