This felt ugly all around, particularly with no real reads on either player and being 170bbs (25/15 over 50 hands) and 255bbs (total unknown) deep.

Yatahay Network - $0.10 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

BTN: 66.6 BB
SB: 109.2 BB
BB: 144.4 BB
Hero (UTG): 255.6 BB
MP: 169 BB
CO: 334.8 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 9s 9d
Hero raises to 2.5 BB, MP calls 2.5 BB, CO calls 2.5 BB, fold, fold, fold

Flop : (9 BB, 3 players) 8s 9c Jc
Hero checks, MP bets 8.6 BB, CO calls 8.6 BB, Hero ???

**I typically will be checking range here OOP 3-way. Is that what theory would say, but micro-practice might be different here? Obviously if we do bet, it would be rarely, with a hand like this and some combo draws + straights, and very big.

Once it goes pot-call, I got a little confused given how deep we all are in this spot and the variety of ugly turn cards for our exact hand here. Thoughts? And if we raise, what are the sizing preferences given stack depth of the two players behind us?**