A few offshore sportsbooks have posted odds on Thursday's Game 3 of the Western Conference Finals between the San Antonio Spurs and Oklahoma City Thunder. Down 2-0, the Thunder are currently a 3.5-point home favorite. The Spurs have now won 20 straight games dating back to the regular season. During that span, they are 16-3-1 ATS. The last time San Antonio was priced as an underdog was April 25 at Phoenix – note that Gregg Popovich decided not to play Tim Duncan, Manu Ginobli and Tony Parker.