My son is currently taking engineering and succeeding both in the classroom and the field. We did find during the recruiting process that only a few D1's would accommodate engineering and baseball, so he ended up going D3. Ivy's, Stanford, and a couple of others. It is much easier if you are a pitcher at the D1 level.
His program is one of the top in the country and they take baseball very seriously, but the coaches only insist that they get their work in on their own if they have to miss practice due to labs or other school conflicts. My son has incredible discipline, and works extremely hard but he does have a life outside of baseball and school, but he is very careful with his spare time which is very limited. Without the willingness to be doing schoolwork on a Friday night you will never make it. That does not mean every Friday, but he does much more studying than others on the team.
They tend to put the high academic kids together on the travel squad so he usually rooms with a pre-med major. It is doable but it does take a lot of discipline.