We will assume the team with the ball will score 50% of possessions, even though the lakers should score more often than the warriors.
If Bynum wins this jump ball 80% of the time (Seems about right being the second best as 68% winner against one of the worst at 31%), this bet cashes almost exactly 60% of the time.
Even if Bynum only wins this jump 75%, we still cash this bet 58.33% of the time.
There is a good chance he wins this more than 80% of the time but we want to stay conservative in our estimates.
The juice sucks, if it was -115 I would be playing for 2-3u, but I see no reason not to play this guy for 1u.