Mitchell worked as an assistant coach for Memphis in 2018-19 during Hardaway's debut season. Hardaway said Tuesday at a news conference that Mitchell has "decided to go in another direction."
Hardaway added that "we definitely appreciate Sam so much and support him." Hardaway said Mitchell will always be like an "older brother" to him.
Mitchell was an NBA head coach with the Toronto Raptors from 2004-09 and with the Minnesota Timberwolves in 2015-16. He was named the NBA Coach of the Year in 2007.