Did somebody help me here?

[Finite_Risk]

CO is 12/5, although he just returned to the table - aggressive post-flop

MP2 is playing 70% of hands in his first few orbits

Thoughts on calling here?
I am most interested in what folks would do if the other guy did NOT call ahead of me, as he made my odds.

Party Poker No-Limit Hold'em, $ BB (9 handed) FTR converter on zerodivide.cx

UTG+1 ($24.40)
MP1 ($64.10)
MP2 ($22.87)
Hero ($25)
CO ($25)
Button ($19.47)
SB ($54.83)
BB ($47.68)
UTG ($43.70)

Preflop: Hero is MP3 with 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img]. CO posts a blind of $0.25. SB posts a blind of $0.10.
3 folds[/i]</font>, MP2 calls $0.25, Hero calls $0.25, CO (poster) checks, Button calls $0.25, 1 fold[/i]</font>, BB checks.

Flop: ($1.35) 8[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] (5 players)</font>
BB checks, MP2 bets $0.25, Hero raises to $2, CO calls $24.75 (All-In), Button folds, BB folds, MP2 calls $22.37 (All-In), Hero calls $22.75 (All-In).

Turn: ($73.47) J[img]/images/graemlins/heart.gif[/img] [color=#0000FF](3 players, 3 all-in)</font>

River: ($73.47) 8[img]/images/graemlins/heart.gif[/img] [color=#0000FF](3 players, 3 all-in)</font>

Final Pot: $73.47

I would have called that anyway. For $20 it's way too easy for someone to push without having a straight. Unless you are darn sure he wouldn't move in without one.

I'd raise pre-flop here. But to answer the question asked...

CO could have a straight or a lower hand he's trying to protect against a scary board. If you think he'd push with a set or 2 pair the math is.

A made straight 56, 6T or TJ = 48 combos
2 pair 87, 97, 98 = 9+3+3 = 15 combos
lower set 77, 88 = 3+3 = 6

1st case you are improving to FH or quads about 1/3.
2nd 2 cases you are so far ahead let's just say you win.

Overall your chances of winning are (48/(48+21) * 1/3) + 21/(48+21) = just over 50%

Dan Harrington says there's always at least a 10% chance he has nothing. I guess I'd call without MP2, but I wouldn't like it much.