The OL, you can see 70 and 55, and it sure looks like Braun (you can see the 7) and Marshall (you can see the 5) are the other 2 OL aside from 67. And Johnson said yesterday he rotates QB's in and out of huddles, so while it is indeed Taquon, it may have just been his rep.
It just seems to me that if you have 4 presumed starters and one other dude, then that dude is running with the 1's for the time being. The fact that Lee is RIGHT there behind the coach leads me to believe they're rotating in and out at LT