The Oakland A's today named longtime organizational pitching instructor Garvin Alston as the club's new bullpen coach. Alston replaces Scott Emerson, who was named the A's pitching coach on June 15. 
Alston was a coach in the A's organization for 11 seasons from 2005-15 before serving as the Arizona Diamondbacks' bullpen coach for the 2016 season. He filled various roles during his tenure with Oakland, including pitching coach at Single-A Kane County (2005-06) and Single-A Stockton (2007-08); Minor League rehab coordinator (2009-14); and Minor League pitching coordinator (2015).
Alston, 45, was originally drafted in the 10th round of the 1992 draft by Colorado. He played professionally for parts of nine seasons, including a six-game Major League stint with the Rockies in 1996.
Alston will join the A's beginning Monday, June 19, for their four-game series at the Coliseum against the Houston Astros.