6’5 250? I mean kids do grow and put on weight but I can’t imagine someone continuing to be athletic and effective as a tackle after putting on the 70 lbs he’ll need to compete at the D1 level.
If he's really 6'5" I could easily see that. All depends on the frame, but I think that happens quite a bit with kids that tall almost naturally gaining 50+ pounds in a relatively short amount of time.