This current hand is taken from a sit and go full ring triple up game on ignition. Blinds are 10-20 and there are no reads yet on opponents. Hero (stack 1677) is dealt A:

K

. Action folds to hero in UTG1 who elects to raise to 60. Folds around to HJ (stack 1500) who calls 60 and the small blind (stack 1330) also calls to make it a three way pot.
Flop comes 2

7

9

(pot 200)
SB checks. I check. HJ checks
Turn comes K
SB checks. I bet 100. HJ folds. SB calls
River comes 6

(pot 400)
Final board is 2

7

9

K

6
SB bets 425. Hero ????