I think Lepsis in Denver is a converted TE.
I think the reason he was never tried there before the pros is that there is a temptation at the lower levels to get the ball in the hands of your best athlete. That's why the receivers always seem to be more athletic than the corners and there are so many HS and college QBs that become safties and the like in the pros. And when you have a Champ Bailey or a Charles Woodson, you play him on offense, too, like Georgi and Michigan did.