In the midst of the 1994–95 Major League Baseball strike, when owners threatened to play the 1995 season with replacement players, Boretti spent spring training with the Cleveland Indians.
[1][6][7] Boretti's coaching career began at Endicott, a Division III school located in his hometown of Beverly, Massachusetts.
[1][5] Boretti's first head coaching position came at Division III Franklin & Marshall, where he replaced Mark Cole ahead of the 2001 season.
In 2005, Franklin & Marshall won the Centennial outright and defeated Johns Hopkins in the conference championship series to receive an automatic bid to the NCAA tournament.
[9][10][11] Boretti was hired at Division I Columbia ahead of the 2006 season; he replaced Paul Fernandes, who had been promoted to associate athletic director.
They defeated Rolfe Division champion Dartmouth in the Ivy Championship Series to advance to the NCAA tournament, Columbia's first since 1976.
[1] After finishing third in the division in 2011 and 2012, Columbia won back-to-back Ivy League titles in 2013 and 2014, defeating Dartmouth in the championship series in both years.