Making a big call

Guy is 36/0/4 after many hands. I think he has a draw cuz he likely raises with a real hand on the flop. Every other hand checks behind on the river...

PokerStars No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($8.50)
SB ($28)
BB ($46.65)
UTG ($38.60)
UTG+1 ($105.75)
MP1 ($37.90)
MP2 ($40.25)
Hero ($93.20)
CO ($58.10)

Preflop: Hero is MP3 with 6, 6.
UTG calls $0.50, 3 folds, Hero calls $0.50, CO calls $0.50, Button calls $0.50, SB completes, BB checks.

Flop: ($3) 8, 5, 7 (6 players)
SB checks, BB checks, UTG checks, Hero bets $2, CO calls $2, Button folds, SB folds, BB folds, UTG folds.

Turn: ($7) 5 (2 players)
Hero checks, CO bets $6, Hero calls $6.

River: ($19) A (2 players)
Hero checks, CO bets $16, Hero calls$16.

sometimes this is a bluff sometimes it isnt.

one thing about the hand is probably check the flop or pot it 6 way.