In a move that was not unexpected, Boston College backup quarterback Emmett Morehead entered the transfer portal Saturday night. In one of the major twists of the BC football season, Morehead was originally set to start for the Eagles this fall. But Thomas Castellanos quickly took the job, and never let go of it. For this season, Morehead, a 6-foot-5, 235-pounder from Woodside, Calif., completed 15 of 30 passes for……