I mentioned this in the game thread. He was clearly laboring from about 6:00 on down in the first half. I know he hit the shot at the end as some have mentioned, but he should have given him a quick blow before the under 4:00 timeout to get him some extra rest.
He had a few miscues from that point on as well - and they were pretty obviously the result of fatigue. He was late getting down the court and fouled one guy on a layup (which I believe was a three-point play). He then came out late and was blown by on the end line. He was also hanging out a bit more on offense away from the basket. Even his last shot or maybe second to last prior to the buzzer to end the half looked a little like, "eh, I'm tired, this'll due for now..." type effort.
Definitely thought it was a big error on JB's part because of how obvious it was that he was seriously fatigued.