BU's linemen seem High School size.
Here's a shot almost straight down the line. There was probably some optical distortion in the first shot, but 79 for Oklahoma is nearly 6' 10" and 330+. That's Baylor they're playing and BU wasn't a bad team this year. Half the teams they played were in the top 25.
Over the last two years, I've done Baylor, Texas, Oklahoma, A&M, Oklahoma State, and several others, and I've never seen a college offensive line with the size OU has.