Dodged bullet or am i the biggest nit?

Posted 7 years, 7 months ago

Blinds: $0.10/$0.25 (6 Players) BN: $32.52
SB: $15.99
BB: $35.20 (Hero)
UTG: $41.55
MP: $17.28
CO: $107.18

Preflop ($0.35) Hero is BB with A 7 6 3

2 folds, CO raises to $0.85, BN calls $0.85, SB folds, Hero calls $0.60

Flop ($2.65) 7 3 8

Hero checks, CO checks, BN bets $1.29, Hero calls $1.29, CO raises to $7.70, BN folds, Hero calls $6.41

Turn ($19.34) 7 3 8 K

Hero checks, CO checks

River ($19.34) 7 3 8 K J

Hero checks, CO bets $18.52, Hero folds

Final Pot CO wins $18.52
Rake is $0.82

He insta pots river, i mean what can he have since he checks back offsuit K