Travis has a very big frame and actually trimmed some weight to move to LB this year when Leach hired Mike Breske to run the 3-4 D. He could have packed on another 15-20lbs to get up in the 270's and gave it a shot at DE, but I think sis pro potential is highest at linebacker and it was a very good move for the coaches to move him there this year.
He has outstanding pass-rush and run stopping abilities, great instincts and solid tackler, but a knock on him will be his ability to drop into coverage, which will be a work in progress since he's only played LB for a year. Total character guy, team first, work ethic and all that. A very deserving guy, who will make the most of his shot in the league and should have a good career if he can continue to develop at LB and stay healthy.
I think late 3rd round is a slightly generous but still a good projection for him, given his intangibles.