I know for myself way way back in the day the decision was 95% about football. However like Rich mentioned that was for 100% scholarship. If I didn't like it or it didn't work out it didn't cost me anything. As for my son. I think it will come down to his skill level. If he's mid 80's the decision will be much more about the education. If he's mid 90's baseball would carry a lot more weight. I think the probability of baseball after school would determine how much baseball is made in the decision. But that's my opinion and the decision will be my sons so we will see.
As for the OP. Find a way to push him and don't stop. My sister had picked out her college by age 12. I still didn't know my senior year. Luckily my parents kept pushing and I'm very glad they did. I work in manufacturing management and every factory I've been in is full of people who were unmotivated 16 year olds that turned into unmotivated 20 year olds that really regret it.