How bad is barreling this river? I'm talking about being committed, and the likelihood that villain will call given board and plethora of missed draws. Assume standard unknown at lower limits.

PokerStars No-Limit Hold'em, 11.5 Tournament, 15/30 Blinds (2 handed) - Poker-Stars Replayer from Poker Hands Replayer



Jizzy Sawya (Button) (t1080)
SB (t1920)

Jizzy Sawya's M: 24.00

Preflop: Jizzy Sawya is Button with ,
Jizzy Sawya bets t120, SB calls t90

Flop: (t240) , , (2 players)
SB checks, Jizzy Sawya checks

Turn: (t240) (2 players)
SB checks, Jizzy Sawya bets t120, SB calls t120

River: (t480) (2 players)
SB checks, Hero (t840) ?