No solid reads...he is 42/30/2.5 after 50 hands.

How often would this type of player be triple barreling with air?
I think the turn is questionable as well...

Pre-flop could be a fold too, but I am in position with a luke-warm hand against someone that plays too many hands...

Thoughts?

Poker Room skin
No Limit Holdem Ring game
Blinds: $0.50/$1
5 players
Converter

Stack sizes:
UTG: $104.80
CO: $111.05
Hero: $127.00
SB: $179.75
BB: $100.00

Pre-flop: (5 players) Hero is Button with 9 7
UTG folds, CO raises to $3.5, Hero calls, 2 folds.

Flop: 6 6 9 ($8.5, 2 players)
CO bets $5, Hero calls.

Turn: 3 ($18.5, 2 players)
CO bets $10, Hero calls.

River: 4 ($38.5, 2 players)
CO bets $20, Hero???