 In between, when arm problems jeopardized Leiter's career, Patterson rebuilt the delivery of his longtime friend and neighbor, as Leiter rejuvenated his career and kept pitching until he was 40 years old.Patterson later worked in the Arizona Diamondbacks system as their minor league pitching coordinator from 1997 to 2000.After that, he got a job with the Toronto Blue Jays as their bullpen coach in 2001 and then as their pitching coach from 2002 through 2004.