Complex sentence: Hassey was a coach for the expansion Colorado Rockies from 1993--1995, and for the St. Louis Cardinals in 1996, and then as a scout for the Arizona Diamondbacks from 1997 to 2003.
Split into simpler sentences: Hassey was a coach for the expansion Colorado Rockies from 1993--1995, and for the St. Louis Cardinals in 1996. He then served as a scout for the Arizona Diamondbacks from 1997 to 2003.