Will he stay or will he go???

Dwyane Haskins says he ain't sure ... but did he just drop a massive clue??

Maybe ... 'cause the Ohio State QB -- who's out in NYC prepping for Saturday's Heisman Trophy ceremony -- told Adam Glyn ... "I'm pretty close to graduating."

Of course, most QBs facing the decision to stay in school or jump to the NFL put at least SOME weight on their degree when making the choice.

So, would Haskins finishing up his credits this year mean he's putting his name in the 2019 NFL Draft?