Donnie J. Ecker
- Bats: Left, Throws: Right
- Height: 6' 4", Weight: 190 lb.
- School: Lewis-Clark State College
- High School: Los Altos (CA) High School
In 2019, Donnie Ecker was hired for his first major league coaching job as assistant hitting coach of the Cincinnati Reds under newly appointed manager David Bell, but he only stayed for one season. In 2020, he moved to the San Francisco Giants as co-hitting coach, along with Justin Viele.
- 2011-2012 Assistant coach, Los Altos (CA) High School
- 2013-2014 Head coach, Los Altos (CA) High School
- June 7th - end, 2014 Assistant coach, Bakersfield College
- 2015 Coach, Palm Beach Cardinals
- 2016 Hitting coach, Palm Beach Cardinals
- 2017 Hitting coach, Peoria Chiefs
- 2018 Hitting coach, Salt Lake Bees