Complex sentence: Tatum returned to Carolina in 1940 as an assistant coach under Bear Wolf, before he filled the head coaching job in 1942 and compiled a 5--2--2 record.
Split into simpler sentences: Tatum returned to Carolina in 1940 as an assistant coach under Bear Wolf. In 1942, Tatum was promoted into the head coaching job himself and compiled a 5--2--2 record.