Keller, 28, joins the Grizzlies after serving as the Bullpen Catcher for the Detroit Tigers AA Affiliate in 2020. Prior to his time in the Tigers organization, Keller served as the Catching Coordinator for the Lake Erie Crushers in 2019. Keller played three years for the Schaumburg Boomers from 2016-2018, winning a Frontier League Championship in 2017. He he was the primary catcher but also saw time as a third basemen, second basemen, and pitcher. 

The Fredericksburg, Virginia native played at and received his Undergraduate and 

Master’s Degree from the University of Mary Washington in 2016 where he also served as the Assistant Coach for two years after graduation. Keller then served as the Catching and Pitching Coach for the Oakton Community College Owls in Des Plaines, IL in 2018 

During the off-season, Keller resides in Arlington, VA working as the Director of Pitching and Catching at Ignite Baseball.