Arnsberg served as pitching coach for the
Montreal Expos from 2000 to 2001 and the
Florida Marlins in 2002 and 2003, but was fired along with manager
Jeff Torborg in May 2003. After a year in AAA in 2004 with the
Syracuse SkyChiefs, he served as the Toronto Blue Jays pitching coach from 2005 to 2009. In 2010, he was hired by the
Houston Astros to serve as their pitching coach. He was fired on June 14, 2011. In 2013, Arnsberg was hired by the Arizona Diamondbacks as their rehab coordinator. ==Personal life==