PokerStars No-Limit Hold'em, $2 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($221.35)
MP3 ($208.15)
CO ($217)
Button ($202.25)
SB ($238.50)
BB ($198)
UTG ($339.50)
UTG+1 ($263.60)
MP1 ($256.25)

Preflop: Hero is MP2 with A, K.
3 folds, Hero raises to $8, MP3 calls $8, 4 folds.

Flop: ($19) 2, 3, A (2 players)
Hero bets $12, MP3 calls $12.

Turn: ($43) 6 (2 players)
Hero bets $20, MP3 calls $20.

River: ($83) J (2 players)
Hero checks, MP3 bets $78, Hero cries


Villain just got to table a few minutes ago and hasn't shown anything down or gotten involved in a hand. Is this an auto-muck for Hero? If it matters, Hero has been running about 19/12, but Villain wouldn't know that.