nothing on opponent, no stats or reads.
SB: $9.10 (91 bb)
BB: $10 (100 bb)
UTG: $10 (100 bb)
Hero (MP): $10.62 (106.2 bb)
CO: $11.92 (119.2 bb)
BTN: $9.71 (97.1 bb)
Preflop: Hero is MP with K

A
UTG folds,
Hero raises to $0.30,
CO folds, BTN calls $0.30,
2 folds
Flop: ($0.75) J

2

K
(2 players)
Hero bets $0.46, BTN calls $0.46
Turn: ($1.67) 2
(2 players)
Hero bets $1.03, BTN calls $1.03
River: ($3.73) A
(2 players)
Hero bets $2.31,
BTN raises to $7.92 and is all-in,
Hero folds
This confused me and I actually timed out, although even given extra time I think I would have ended up folding. In a spot like this I expect him to clearly be shoving with a made hand that he thinks it good, not a bluff. Even AJ I see him calling same with KJ.
My thoughts are that Im up against slowplayed JJ, trip 2s, back door flush or QT is very possible.