Looked like he bit on a play fake, let the guy get away from him by 15 yards. He had very loose coverage in the first place though. I think he would have been beat anyway if the pass was good. Instead the pass was a bit off the mark and he recovered just in time to tackle the receiver in the endzone.
Thats a mistake, he's a smart guy so that won't happen much once he gets used to the offence.
What I did see that worried me quite a bit was how he was getting run over by larger players. Much like that well circulated "low-lite" film that was making its rounds here. He doesn't seem to get very good leverage when he tackles. I don't think he'll ever become a punishing hitter, but I hope he changes his habits enough not to get steamrolled on as many plays as I saw in the last game.