Shortly after his appointment to Saint Anselm, Harring served as the manager of the Keene Swamp Bats, leading them to the 2000 New England Collegiate Baseball League (NECBL) championship.
After struggling to a 9–35 finish in 2001, Harring guided the Hawks to a 17–32 clip in 2002, which included a 15–17 showing in the NE-10 (fourth place in the six-team Pepin Division).
The 2003 Saint Anselm squad posted a record of 23–20 (its first winning season in 23 years) and captured the Eastern College Athletic Conference (ECAC) Division II championship.
The UMass Lowell baseball team transitioned to Division I with little problems in 2014, finishing third in their new conference, the America East, with an overall record of 20–22 and a 10–10 in-conference.
UMass Lowell enjoyed a great deal of success in 2011, going 37–14 and clinching the fourth NCAA tournament bid of Harring's tenure.
Under his watch, six River Hawks were named to the NE-10 All-Star Team and Jack Leathersich claimed the NE-10 Freshman Pitcher of the Year honor.
The 2007 season saw the River Hawks go 33–20, marking the second straight year and ninth time in school history UML has eclipsed the 30-victory plateau.
In 2006, the River Hawks (37–14) posted the second-highest win total in school history and captured their fifth Northeast-10 Conference Tournament championship in six years.