I definitely hope we get this kid.
(1) He's 6'6" with long arms,
(2) He has a prototypical Offensive Tackle body,
(3) He has a nasty streak and passion like few others,
(4) He can play both Tight End and Offensive Tackle,
(5) He will only be 17 years old at graduation, so he's playing with a bit of a disadvantage vs his peers in HS,
(6) His film is very impressive, and
(7) He loves UT!
So what if he's only 3 stars? So was Chance Hall, and he looked pretty good this year playing as a true Freshman. My guess is that Niehaus will start getting more offers once more evaluators start seeing him. He's already cleaned up in his local area getting offers from just about every FBS school in a 200 - 300 mile radius other than Ohio State.
And sure, he's not a 100% sure thing. The trainers will have to get him into strength & conditioning and bulk him up. But there's no such thing as a "sure thing" in recruiting. I'll take the kid with immense upside who is passionate about the game, rather than the kid with nice measurables but who isn't all that dedicated to their craft.