Originally from Ashburn, Va., Walsh was born into an athletic family. His father played baseball at Lehigh and his mother was a lacrosse player at the University of Richmond. Walsh followed in their footsteps, becoming a star on Flint Hill's baseball team in high school, where he was a three-year starter and named to the Mid-Atlantic Athletic Conference All-Conference Team. Currently, he's a right-handed pitcher for Lafayette, where he also studies civil engineering.