[Lost_My_Stink]

In this situation, I would chk/call all the way unless you improve. It is entirely reasonable that he hit a J or T on the flop so you don't want to raise him and be forced to fold to a three bet. Guys will typically donk here with A high, any pair, any draw, or any two cards (in some cases).

So I think the 99 is too strong to fold unless the turn/river bring like AK. In your situation though, hitting the 99 on the river warrants a cap if this guy has proven to you he can be aggressive on the river without the nuts. Without any info on the guy, I think you have to just call the three bet.

But, I could be wrong... I'm still just a 3/6 junkie...