Preflop: Hero is BTN with A A K 7
UTG raises to $0.10, MP calls $0.10, CO raises to $0.47, Hero raises to $1.68, 2 folds, UTG calls $1.58, MP folds, CO calls $1.21
Flop: ($5.21) 3 J 9 (3 players)
UTG checks, CO bets $5.01, Hero raises to $5.36 and is all-in, UTG raises to $9.13 and is all-in, CO calls $4.12
Turn: ($28.83) 2 (3 players, 2 are all-in) River: ($28.83) Q (3 players, 2 are all-in)
Spoiler:
Results: $28.83 pot ($1.00 rake)
Final Board: 3 J 9 2 Q
Hero mucked A A K 7 and lost (-$7.04 net)
UTG showed 9 8 9 8 and lost (-$10.81 net)
CO showed 8 J T 6 and won $27.83 ($17.02 net)