Curtis Allan Hasler
- Bats Right, Throws Right
- Height 6' 7", Weight 215 lb.
Curt Hasler has been a pitching coach for 30 seasons (through 2021).
Hasler was taken by the Chicago White Sox in the 21st round of the 1987 amateur draft and would spend over 20 years in their organization. As a rookie, he was 4-3 with a 2.55 ERA for the GCL White Sox. He went 7-11 with a 3.44 ERA for the 1988 South Bend White Sox. The big right-hander led the Midwest League in both hits allowed (206) and hit batsmen (19). In 1989, he improved to 14-8, 3.39 for the Sarasota White Sox, with only 32 walks in 164 2/3 IP. He led the Florida State League with 19 hit batsmen but was only two wins shy of leader Wally Trice. For the 1990 Birmingham Barons, Curt had a 9-6, 3.26 mark. He got into 11 games for the 1991 Vancouver Canadians (0-2, 7.81, 44 H, 24 BB in 27 2/3 IP) before finishing the year as a coach back with Sarasota.
- 1991-1992 Pitching coach GCL White Sox
- 1993-1994 Pitching coach Hickory Crawdads
- 1995-1996 Pitching coach South Bend Silver Hawks
- 1997-1998 Pitching coach Winston-Salem Warthogs
- 1999-5/14/2002 Pitching coach Birmingham Barons
- 5/14/2002-2004 Pitching coach Charlotte Knights
- 2005-2007 Pitching coach Great Falls White Sox
- 2008 Pitching coach Great Falls Voyagers
- 2009-2010 Pitching coach Bristol Sox
- 2011-2016 Minor league pitching coordinator Chicago White Sox
In 2017, he was named bullpen coach of the Chicago White Sox, replacing Bobby Thigpen. In 2018 his title changed to assistant pitching coach though it appears he functioned as a bullpen coach in that first year. He kept the title of assistant pitching coach through 2020. His title reverted back to bullpen coach for the 2021-2023 seasons.