Only a donkey would fold 63

Party Poker No-Limit Hold'em, $0.00 BB (8 handed) - Party Poker Converter Tool from FlopTurnRiver.com

Hero (Button) ($5.00)
SB ($6.62)
BB ($5.00)
UTG ($2.61)
UTG+1 ($4.86)
MP1 ($1.77)
MP2 ($1.52)
CO ($3.57)

Preflop: Hero is Button with 6 3
4 folds, UTG+1 calls $0.04, Hero calls $0.04, 1 fold, UTG checks

Flop: ($0.14) 6 3 9 (3 players)
UTG checks, UTG+1 bets $0.16, Hero raises to $1.00, 1 fold, UTG+1 calls $0.84

Turn: ($2.14) Q (2 players)
UTG+1 checks, Hero bets $1.76, UTG+1 calls $1.76

River: ($5.66) 2 (2 players)
UTG+1 checks, Hero bets $2.20, UTG+1 calls $2.06 and is all-in

Total pot: $9,30

Villain had J9