Rapson began on piano at age five before switching to trombone. He studied at Westmont College, graduating in 1976, then took his MA in composition at California State University. Rapson taught at Westmont from 1980 to 1990, concurrently playing in Los Angeles with Vinny Golia (1979-90). He also worked with Tim Berne (1980, 1986), Walter Thompson (1980), Bobby Bradford (1986-90), and John Carter (1988-90). He has worked extensively as a leader with noted West Coast jazz players.
The most remarkable thing about this box set of four of Tim Berne's reissued releases from the JMT label is that the wealth, depth, and breadth of the material here was recorded in only two years. This is astonishing, if one considers – merely by cracking the box set open (a very handsome cardboard sleeve, really) and looking at the notes – that Berne composed, arranged, and performed on these albums with no less than four different bands during the period. For starters, from 1979 there is The Five Year Plan, which featured Berne alongside the late clarinetist John Carter, wind and reedman Vinny Golia, drummer Alex Cline, and bassist Roberto Miranda.