He'll have to adapt quickly. He's done that before, not throwing a discus until he was 18, then becoming a champion and Olympian at 21. His initial value might be as a backup everywhere. As others have mentioned, he might push Dial for short yardage defense, and Dobbs for TE duty and Dixon for short yardage blocking. His background in rugby might prepare him to be a FB and carry the ball on short yardage. Of course, this will tax his relatively short time to learn all these roles.