Quick, think of a college athlete. Chances are the person who comes to mind is a football or basketball player at a powerhouse Division I school like Louisiana State University or the University of Kentucky. Maybe the player resembles, say, Joel Embiid, who turned a chiseled, 7-foot frame into a full-ride scholarship at the University of Kansas before ascending to NBA stardom.But the typical student athlete looks a lot more like Matteo DiMayorca, a Harvard junior recruited to play offensive tackle on the college’s football team.