Manny Acta was hired as the Mariners' third-base coach for the 2016 season on Tuesday.
"I believe Manny will be a great addition to our staff," manager Scott Servais said. "I've known him for over 25 years, since we were teammates in 1989. His experience as a Major League third-base coach and manager, paired with his extensive player development background, will be very valuable to me, and to our players, as we move forward."
Acta, who never reached the big leagues as a player, managed the Nationals from 2007-09 and the Indians from 2010-12. Between the two stints, he is 372-518 as a manager.