50nl unexpected spot - sanity check

Not sure why the HH has UTG and myself out of order, but everyone is labelled with correct positions.

SB is the table money. 83/23 with 56% fold to cbet over 70 hands. 67% donkbet and 22% raise cbet. He got his stack because another TAG at the table didnt seem to notice that he actually only played big pots with big hands. Both those times he had two pair. First one he bet flop large (but not overbet) when PFR checked to him, and second one he min check/raised flop. He does bluff/steal a bit, but its been normal bet sizes, and places like when the pfr checks flop. This is the first overbet I've seen. I've upped my aggression recently and played a bunch of pots against him, winning most but as you can tell from my stack, only small ones. He's min c/r'd me once and I folded.

No-Limit Hold'em, $0.50 BB (4 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

Hero (Button) ($57.88)
UTG ($50.75)
SB ($117.54)
BB ($61.14)

Preflop: Hero is Button with K, A
1 fold, Hero bets $1.50, SB calls $1.25, 1 fold

Flop: ($3.50) 6, 8, 9 (2 players)
SB bets $12, Hero raises $56.38 (All-In)

My reasoning is, he's shown a preference for c/r for his big hands, and I've been c-betting a lot. I dont see him playing two pair or a set this way. I'm not sure about real monsters though, maybe a flush he would, but I dont think so. Therefore I think he's either bluffing or got something like a 1P hand trying really hard to protect it. I'm fairly sure my overs are good, so with...14 outs I dont mind a call, and thanks to his overbet I dont mind him folding either and taking a nice medium pot with A high.

very standard

if he polarizes his range this way, shouldn't we just call?

Originally Posted by pocketfours

very standard

Thanks, I figured so but wanted to check my logic.

He folded so I dont really know what he did it with other than my assumption of bluff or weak 1P type hand.

If you had over $100 I'd fold.