villain was 21/7 over 58 hands.im having trouble putting him on a K,but seeing him fire on the river,he possible have Jx by limping,although he seem to be more Tagg than Lagg.whats my turn play here?

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

UTG ($25)
MP ($27.45)
Button ($6.95)
Hero (SB) ($28.05)
BB ($25.95)

Preflop: Hero is SB with 9, 9
1 fold, MP calls $0.25, 1 fold, Hero raises to $1.50, 1 fold, MP calls $1.25

Flop: ($3.25) 3, 2, J (2 players)
Hero bets $2, MP calls $2

Turn: ($7.25) K (2 players)
Hero checks, MP bets $3, Hero calls $3

River: ($13.25) 8 (2 players)
Hero checks, MP bets $5, Hero folds

Total pot: $13.25 | Rake: $0.60