Boston-born Merrigan played high school ball at Boston College High School, which boasts one of the top baseball programs in the state. Merrigan captained the team his senior year, leading the Eagles to the state semi-final game. A leadoff hitter, he was awarded the offensive player of the year award. After high school, Merrigan attended Amherst College where he was a four year starter, serving as the Lord Jeff’s leadoff hitter and left fielder. He captained the team his senior year and finished his career with a .307 batting average and .404 OBP. Merrigan is one of a few Amherst baseball players to have over 100 hits and 100 runs scored in their career.
Upon graduating, Merrigan returned to Amherst and served as the outfield and hitting coach for the Lord Jeffs. The following year, he returned to his HS alma mater to teach and serve as the assistant varsity baseball coach. Before entering the military, Merrigan played in both the Yawkey and Cranberry League. He is now a fourth year medical student at America’s Medical School in Bethesda, MD.