Didn’t really understand the 15-years penalty anyway. Isn’t the first sideline interference a warning if there’s no effect on the game? Regardless, it was clearly not malicious and had no effect on the game, and the flag should’ve been picked up.
Worked out fine in the end. But I’ll echo the comments above - Mark is a really great dude and loves TCU. You can be sure he feels terrible and will continue to come to work every day and work his ass off for the Frogs - just as he’s done every day for, IIRC, about 15 years.