Bill Rosner was hired as the head softball coach at Fontbonne University in the spring of 2008. In 2009, Rosner’s first year as Fontbonne’s head coach, he led the Griffins to a share of the St. Louis Intercollegiate Athletic Conference Championship. His Griffins finished with a 21-18 overall record and an 11-3 SLIAC record. In 2010 the team finished second in SLIAC, but won the conference tournament gaining an automatic bid to the NCAA national tournament for the first time in Rosner’s career as head coach. In 2011 and 2012 Fontbonne rebounded to win the conference and conference tournament going 28-2 in regular season play and an undefeated mark of 6-0 in tournament play. This again advanced the Griffins to the national tournament for the last three years. 2013 marked a record-breaking season as the Griffins posted a 34-12 record, tieing the most wins in a season, and advancing them to the NCAA national tournament for the fourth year in a row. The Griffins also were ranked #23 in the NFCA rankings. Rosner is the winningest coach in Fontbonne Softball history, and him and associate head coach Mike Akers won their 100th game as head coaches on May 2, 2012.
Prior to becoming Fontbonne's head coach, Coach Rosner spent more than four seasons as an assistant softball coach at Fontbonne from 2002-2006. During that time, Fontbonne advanced to the NCAA Division III National Softball Tournament three times. Coach Rosner spent 2007 and 2008 as the assistant softball coach at NCAA Division I Saint Louis University leading them to conference tournament play for the first time in school history.
In addition to his collegiate coaching experience, Coach Rosner brings more than 15 years of club level coaching to Fontbonne. He has spent time coaching with the St. Louis Lazers, St. Louis Chaos and St. Louis Fusion. Coach Rosner attended the University of Missouri-St. Louis. Bill lives in Bridgeton with his wife Mary and has four children Taylor, Billy, Samantha and Blake.