[RustyBrooks]

As I recall the chance that he has paired by 5th st if he started with a legitimate 3 card hand is about 50%. The times he has not paired, he'll have an 8 some times, and the rest of the times he'll have a 7, often a better one than you. If he has a better 7, you're in bad shape, about a 3:1 dog and you'll be calling 3 bets to win 7. However, even if you give him credit for having started with a 3-card 8 or better, you're 50/50 on 5th st. If you give him credit for a 3-card 6, you're a 60:40 dog against his range. I don't think you have to give him credit for better than a 3 card 8 though, because he's only betting into 2 7s and an 8.

He has an auto-bet on 4th (and I think it's correct for him to bet there, even if he's paired). On 5th... A lot of players are going to auto-bet there but I think it's closer to wrong to do so unless you have either a made hand of some description, or a hell of a draw.