Among Le Moyne's Division I leaders, Harring ranks second in batting (.367), third in slugging percentage (.609) and 21st in hits (108). He led the Dolphins in runs, hits and doubles in his junior and senior years. He was inducted into Le Moyne's Gold Wave Hall of Fame in 2003, Harring helped the Dolphins to a collective record of 54-18-1 in his junior and senior seasons (.740), Le Moyne's first years as a Division I program.
After graduating from Le Moyne with a degree in business administration, Harring spent two years in the Atlanta Braves organization with the Durham Bulls of the Carolina League where his manager was former Boston Red Sox's manager Grady Little.
Harring accepted his first coaching position at Northeastern University, where he remained from 1996–1999. During his stay, the Huskies posted a collective 105–88 record and captured the 1997 America East Conference Tournament. That year, the Huskies advanced to the NCAA Tournament where it defeated Bethune–Cookman, before falling to Stanford and Cal State–Fullerton in the West Regional.
In 2000, Harring was named the head coach at Saint Anselm College. 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.