Donald Carl "Tripp" Keister (born September 27, 1970) is an American professional baseball coach with the Omaha Storm Chasers, the Triple-A minor league affiliate of the Kansas City Royals.

[1] Keister amassed a career batting average of .269, but he only managed two home runs across four minor league seasons before he retired from playing.

[3] Keister was fired from the Nationals organization in September 2022 by De Jon Watson, director of player development.

[4] Keister spent the 2023 season as the bench coach for the Double-A Frisco RoughRiders in the Texas Rangers organization.

For the 2024 season, he is assistant coach of the Omaha Storm Chasers, the Triple-A affiliate of the Kansas City Royals.