Following the 2006-07 season, Hammer was named the Basketball Coaches Association of Michigan (BCAM) college coach of the year. Hammer also coached the Gold Medal team (17 and under) at the United World Games in Klagenfurt, Austria during the summers of 2009 and 2010. Hammer's resume at Aquinas College has been nothing short of spectacular. Hammer was the fastest coach in school history to 100 wins and is the only coach to take a team to national tournament four times. His teams have also won three out right WHAC championships and two out right WHAC tournament championships. Hammer, who holds the record at Aquinas for most coaching victories, has amassed a record of 246-160 in his previous thirteen seasons guiding the Saints
With more than 44 years of basketball and athletics leadership experience under his belt, Hammer is hardly a stranger to building winning programs. He served as athletic director at Coldwater High School (Mich.), where he also coached the boys basketball team from 1994 through 2003. His career highlights at Coldwater include a Class B semi-final berth in 1999 and a Class B Coach of the Year award in 1999. During his five years as basketball coach, Hammer led the Cardinals to a 66-45 record, including school records of 24 victories and a winning streak of 18 games in 1999.
Before heading north to Coldwater, Hammer was an assistant coach at Southern Methodist University in Dallas, Texas from 1989 through 1993. Working with Mustangs head coach John Shumate, Hammer helped transform the team from the league cellar to the Southwest Conference championship and an NCAA Tournament berth in 1993, finishing 20-8 overall and going 12-2 in the conference.
Hammer graduated from Central Michigan University with a Bachelor of Arts degree in political science in 1970, and went on to earn his Master's in educational administration at CMU in 1976.
Hammer's college coaching experience began at Delta College (Mich.) as an assistant from 1978 to 1980. He left for a year to assume head coaching duties at Bridgeport High School (Mich.). Hammer, however, returned to Delta College in 1981 as head coach. He tallied a 57-24 record during his three years and led the Pioneers to an Eastern Conference Championship in 1982. He left in 1984 to become an assistant at the University of Michigan. During his four years in Ann Arbor, Hammer helped the Wolverines earn four NCAA tournament berths and two Big Ten Championships with an overall 100-27 record. Hammer also served as an assistant coach at Hardin-Simmons University in Abilene, Texas, from 1988 to 1989.