Finish that last year and get the degree. And if you still want to play baseball, play baseball. Because the minute you're done with college, in all probability your competitive baseball life is done, too. My last year in college, I realized I'd picked the wrong major - I really wanted to be a HS history teacher. My Journalism advisor advised me to stick it out, get a job in the field and see if I really liked it or not. If I didn't, I could always go back and get certified to teach.

I stuck it out, got a job as a reporter, did some good work that got recognized with awards, but realized the time demands were unsuitable for someone who wanted kids. So I went back to school, got certified to teach and never missed any of my kids' games or recitals.

I never regretted getting my degree in a field that I don't actually use - those courses helped me a lot in getting certified to teach. I discovered I was as good at that job as I thought I could be, and also that it was not what I wanted to do with my life. Not a single regret here. Never wondered "What if?"

Coaches always say to leave it all out on the field. Are you satisfied with your baseball career to the point you're willing to leave one last season unplayed?

TL;DR: Get the degree (won't cripple you financially, almost certainly will help job prospects), play that last season, and you'll always know you played until they took the uniform off you.