Jacob Michael Diebler (born October 28, 1986) is an American basketball coach and former player. Since 2019, he has served as an assistant coach at Ohio State. He has previously served as an assistant at both Valparaiso and Vanderbilt under his college head coach and current Grand Canyon head coach Bryce Drew. He has also worked under former Ohio State head coach Thad Matta as a video coordinator in between his assistant coaching jobs at Valparaiso and Vanderbilt. He is known for being a good recruiter, being the primary recruiter for 5-star recruit and future Cleveland Cavaliers guard Darius Garland.