Villain is a weaker reg running 27/21/2.6 with a 7% 3bet.
The only note i have on him says "calls 3bet IP with 77, calls 2 barrels on JJx A"

With my read I guess I should never bet the turn here.

Does he always show up with something like 9x or TT here? I was very confused.

$0.50/$1 No Limit Holdem
5 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($110.35)
CO ($70.55)
Hero ($115.25)
SB ($94.35)
BB ($84.95)

Pre-Flop: ($1.50, 5 players) Hero is BTN
2 folds, Hero raises to $3, SB calls $2.50, BB calls $2

Flop: ($9, 3 players)
SB checks, BB checks, Hero bets $6, SB calls $6, BB folds

Turn: ($21, 2 players)
SB checks, Hero bets $15, SB calls $15

River: ($51, 2 players)
SB bets $20, $20 to Hero ($91.25)?