Top Pair No Good?

More often than not I end up regretting big moves like this in tournaments, but I think this one is alright. It worked, anyway.

Full Tilt Poker, NL Hold’em Tournament, 120/240 Blinds, 25 Ante, 6 Players
LeggoPoker.comHand History Converter

MP: 25,020
CO: 25,268
BTN: 3,120
SB: 6,095
Hero (BB): 6,510
UTG: 7,269

Pre-Flop: (510) 2 A dealt to Hero (BB)
UTG folds, MP raises to 720, CO calls 720, 2 folds, Hero calls 480

Flop: (2,430) K J 5 (3 Players)
Hero checks, MP checks, CO checks

Turn: (2,430) A (3 Players)
Hero checks, MP checks, CO bets 960, Hero calls 960, MP calls 960

River: (5,310) 9 (3 Players)
Hero bets 4,805 and is All-In, 2 folds

Results: 5,310 Pot
Hero mucked 2 A and WON 5,310 (+3,605 NET)

MP was new to the table, but so far he’d been pretty tight/straightforward. CO was a giant calling station, especially pre-flop. He was in like 70% of pots, rarely as the aggressor. He pretty much always potted it when he liked his hand, but would call with as little as a gutshot.

Preflop and flop are pretty standard. Leading the turn is an option, but really I’m still not happy with my hand, and I want to see what happens behind me. If MP bets or if CO pots it, I’m folding. I wasn’t sure what to make of CO’s bet, but getting nearly 4:1, I think it’s a call. When MP overcalls, I decide my hand is probably not good. If I’m lucky, I’ll get a chop.

But when the river falls, I think a flush is a very reasonable holding for me, and more importantly, I wasn’t too concerned about anyone else having it. MP passed up two opportunities to bet, which makes me think he probably didn’t have a flush draw. And CO’s range is so wide that flushes can only be a small piece of it. I also don’t think he has something really strong like top two or a set that would be tempted to spite call, because we would have heard from him sooner.