Martin has spent the past three seasons as the head coach at California. Martin is a native of East St. Louis, IL.
ESPN's Jeff Goodman was first to report that the Tigers offered Martin their coaching position, which came open March 5 when first-year athletic director Jim Sterk announced Kim Anderson would not return.
This leaves the Pac-12 with one coaching vacancy after Washington made a decision to keep Lorenzo Romar after the worst season in school history.
Martin has proven his recruiting talents by bringing five-star players like Jaylen Brown and Ivan Rabb to Cal in 2014.
The Golden Bears lost to Cal State-Bakersfield in the first round of the NIT on Tuesday, giving Martin a 62-39 record in his three years. He will become Missouri's fifth head coach since 1999.
The lone exception was a Sweet 16 run by Martin's 2013-14 Tennessee squad.
The Bears made the 2016 NCAA tournament but were not selected this year.
Golden Bears AD Mike Williams released a statement confirming the news, stating that Martin will "accept a position at another school", as he had a "strong desire to move closer to home".
Martin is 186-121 in nine seasons as a head coach, including stops at Tennessee and Missouri State prior to his tenure in Berkeley. They have failed to make the NCAA tournament four years in a row and they hit rock bottom after Frank Haith left the program.
Martin's name has always been tied to Missouri.
It'll be interesting to see what Cal does.