Bill Decker was introduced as the Joseph J. O'Donnell '67 Head Coach for Harvard Baseball on September 26, 2012.

Decker, the 2008 ABCA National Coach of the Year, completed his 22^nd season as head coach of the Trinity College (Conn.) baseball team in the spring of 2012. Trinity’s all-time winningest coach, he owns a 529-231 (.696) record while winning five conference championships and advancing to nine NCAA Tournament appearances and winning one national championship.

In 2008, Decker led Trinity to a 45-1 mark en route to the school's first-ever NCAA Division III National title. After finishing the regular season undefeated, the Bantams ran their record streak to 44 games, which is the longest winning-streak in Division III history. The .978 winning percentage set a new NCAA record in any division in any sport. 

On top of being selected as the 2008 ABCA National Coach of the Year, Decker was also selected as the New England Coach of the Year in 1999, 2004, 2008 and 2009 as well as the New England Small College Athletic Conference Coach of the Year in 2000, 2003, 2008 and 2009.

In 2012, Decker led the Bantams to a 34-11 record and a fifth NESCAC Championship title. In 2009, the Bantams won the NESCAC Championship, and the New England Regional Championship to earn a second consecutive bid to the Div. III College World Series. In 2007, Decker's team advanced to NCAA Tournament play for the third time in five years and won four games in the regional.

In 2005, Decker guided Trinity to a 35-9 record and was named the New England Intercollegiate Baseball Association (NEIBA) Coach of the Year. Trinity also won its second NCAA Division III Regional Championship title in three years and made its second trip to the NCAA Division III World Series.

All told, Decker owns 537 wins as a head coach at the collegiate level including one year at Macalester College in 1990. He got his college coaching start in 1989 as an assistant coach at Wesleyan (Conn.) Prior to that, Decker served single years in assistant roles at Deerfield Academy (Mass.) and Phillips Exeter Academy (N.H.) In all four of those stops, Decker also served as a member of the schools' football programs. He also served as a graduate assistant coach in football at his alma mater, Ithaca College (N.Y.)

Decker has been an active member of the New England Intercollegiate Baseball Association as a regional coordinator. In 1997, Decker was a member of the USA Baseball National Trials coaching staff and has made summer trips as part of Major League Baseball International. Eight Trinity players have continued their baseball careers at the professional level in the past seven years, and Jonah Bayliss became the first NESCAC player in 10 years to appear in a major league game in 2006. Decker-coached athletes compete annually in the NCAA-sponsored collegiate leagues each summer.

A 1985 graduate of Ithaca College, Decker received a bachelor's degree in physical education with a minor in business. He also holds a master's degree in physical education with a concentration in coaching, which he received from his alma mater in 1992. Decker’s baseball career was cut short due to injury in college but the two-sport star was a team captain and an All-America defensive back for the football team.

Decker and his wife, Nancy, have three children, Kyle, Sarah and Kacey. 

Bill Decker Yearly Record
Year       W     L      Pct.      Postseason
at Wesleyan (23-8, .742) - Assistant Coach
1989 23    8      .742     ECAC quarterfinals
at Macalester (8-26, .235) - Head Coach
1990 8 26 .235     --
at Trinity (529-231, .696) - Head Coach
1991       14     9      .609     --
1992       19     9      .655     ECAC semifinals
1993       12     8      .600     --
1994       18     13    .581     ECAC quarterfinals
1995       21     12    .636     Declined ECAC invitational
1996       19     15    .559     ECAC finals
1997       17     13    .567     ECAC semifinals
1998       23     11    .676     NCAA Regional Tournament
1999       25     11    .694     NCAA Regional Tournament
2000       22     9      .710     NCAA Regional Tournament
2001       25     10    .714     NESCAC Tournament
2002       26     10    .722     NESCAC Tournament
2003       27     12    .692     NCAA World Series
2004       27     9      .750     NESCAC Tournament
2005       35     9      .795     NCAA World Series
2006       17     18    .486     --
2007       30     8      .789     NCAA Regional Tournament
2008       45     1      .978     NCAA National Champions
2009       33     7      .825     NCAA Regional Tournament
2010       19     11    .633     --
2011       21     15    .583     --
2012       34     11    .755     NCAA Regional Tournament
Total       537   257  .676     (Head Coaching)