Villain is 48/15/2.5 over ~100 hands. I haven't seen him do anything terrible post-flop, has mostly been folding to my c-bets. Not sure how he got his stack. Line check?

Full Tilt Poker - No Limit Holdem Ring game - Blinds: $3/$6 - 6 players - Converter

Stack sizes:
UTG: $597
Hero: $801.45
CO: $1511.20
Button: $705.60
SB: $636.80
BB: $576

Pre-flop: (6 players) Hero is UTG+1 with T T
UTG folds, Hero raises to $21, CO calls, Button calls, 2 folds.

Flop: T 2 5 ($72, 3 players)
Hero bets $60, CO folds, Button calls.

Turn: 9 ($192, 2 players)
Hero bets $132, Button raises to $264, Hero calls.

River: 7 ($720, 2 players)
Hero checks, Button is all-in $360.6, Hero folds.