100NL TPNK in raised pot

[nogenius]

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP2 ($49)
MP3 ($47.55)
CO ($51.40)
Button ($98)
SB ($326.95)
Hero ($100)
UTG ($60.85)
UTG+1 ($102.85)
MP1 ($93.90)

Preflop: Hero is BB with 5, K.
4 folds, MP3 calls $1, 2 folds, SB completes, Hero checks.

Flop: ($3) 9, J, K (3 players)
SB bets $1, Hero ???

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I've only been at the table for an orbit or two, but SB has loose stats so far (like 80/0), and the other player in the pot is an unknown.

What's your play here, and your move on later streets?

[givememyleg]

Fold?

[martindcx1e]

push?

[givememyleg]

Flip a coin... heads do my response, tails do martin's.