I have him at 21.1/16.4 after 128 hands with an AF of 5.5. He hadn't done anything out of the ordinary from what I've seen.

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($116.25)
UTG ($129.45)
MP ($99.40)
CO ($99)
Hero ($127.45)
SB ($12)

Preflop: Hero is Button with K, A.
UTG calls $1, 2 folds, Hero raises to $4, 1 fold, BB raises to $16, UTG folds, Hero calls $12.

Flop: ($33.50) A, T, 5 (2 players)
BB bets $22, Hero calls $22.

Turn: ($77.50) K (2 players)
BB checks, Hero checks.

River: ($77.50) 7 (2 players)
BB bets $78.25 (All-In), Hero ?