The answer is partly yes & no. The #60 is an offensive line number. Offensive lineman are not eligible receivers which the TE position is. With that said, there is an exception where you can bring in a lineman to play TE but they have to report to the officials they will be doing so which makes them eligible.
Cool, that's kinda what I thought but wasn't sure. So I'm gonna renew my question, why do we need Jeron Mastrud when we could just line up Will Yeatman in the TE position for 2 TE sets and such? He's a converted TE, he should be able to catch a pass if we needed him too and still be a nice blocking TE. The only concern I could see there being was that if you cut Mastrud and Yeatman ends up starting at tackle then you don't have a blocking TE, but honestly if Yeatman is our starting tackle, we have bigger issues than not having a blocking TE in my opinion.