Probably not at BYU. The old adage that if you have 2 QBs then you have none. While they could take some snaps together, it would be few and far between. Honestly at this point the only thing that Mangum brings is a little more arm strength (I love Mangum, but I don't think he sees the field, runs, or is as accurate yet as Taysom). So why would you put him out there?