6’2” 160 throwing mid 80’s at fourteen is very projectable as a D1 pitcher. Maybe stockier, more filled out kids look bigger. But your son has great size for his age. There will be college coaches envisioning him throwing 90 in a couple of years.
My son was more interested in being a position player than pitching. He was a varsity shortstop until the travel team moved him to center. In individual showcases he did both the infield and outfield drills and played anywhere in scrimmages. In tournament games he played center. In college he played seven positions over his career.
Unless your son is consistently driving the ball as a hitter and has the potential to run a sub seven sixty I would lean towards pitcher. He has the size and the fastball.