Tough river decision

[Kyriefurro]

Against a relative unknown, I think I'm calling here.

Villain's push is really just a single PSB. Like the other posters, I think a set would have raised earlier. And while the river did complete a straight, there are just too many other possible hands out there that could play like this. This type of play could easily come from a villain w/ AK, AQ, A9 or T9 - especially if he really is TAG since you showed so much weakness with that river check. For that matter if villain's a good TAG, there's a fair chance this is a bluff.