Based on this recently posted link (below) 25th percentile is 1450 and 75th percentile is 1560 for regular Columbia students. My sense of it, is that your son is near the lower-middle for a recruited baseball player at Columbia. If he throws 94mph with 4 pitches and pinpoint control then 1350 on his SAT is probably enough ;-).
He's in the ballpark academically. The bigger question is he in the ballpark athletically. Coaches identify talent they want then ask SAT/ACT questions to see if he qualifies. Got to have both.