PokerStars - $14.39+$0.61|15/30 NL (2 max) - Holdem - 2 players
Hand converted by PokerTracker 4

SB: 48.6 BB (VPIP: 73.24, PFR: 50.72, 3Bet Preflop: 24.00, Hands: 78)
Hero (BB): 51.4 BB

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has J 7

SB raises to 2 BB, Hero calls 1 BB

Flop: (4 BB, 2 players) 5 J 4
Hero checks, SB bets 2 BB, Hero calls 2 BB

Turn: (8 BB, 2 players) 2
Hero checks, SB checks

River: (8 BB, 2 players) 7
Hero checks, SB bets 9 BB, fold

Villain seems to like making moves.

Notes:
[F] overbet shoved complete air when checked to in 3b pot
[F] overbet shoved MPMK when checked to in iso pot
[F] overbet shoved MP on wet board as iso cbet
[F][T] lead pot with MP, then overbet shoved 3rd pair on dry board

Should this be a call on the river against this player?
What if we are readless?

I feel like most players barrel the turn if they pick up a decent FD (without a pair) and also barrel the turn if they hit their flush. His river overbet range could contain a lot of air.

Given your reads I'd probably call. We have to win here 34.6% of the time to break even so it's kinda borderline I guess.

I agree.