I do traffic studies and I've had data where the roadway temp is in the 140s when the air temp is 95-100. And this 'turf' is largely plastic and rubber that just soaks in the heat.
Maybe college football teams should take a note from their basketball brethren and have a scrimmage against another school in mid August so they both can get the rust off.
I assume Tayven practiced the year he was at IU and has some semblance of an idea of what Haines likes to do. It would explain him being upright for the half.