Oklahoma City Thunder (64-18, first in the Western Conference) vs. San Antonio Spurs (62-20, second in the Western Conference)San Antonio; Thursday, 8:30 p.m. EDTLINE: Spurs -3.5; over/under is 218.5WESTERN CONFERENCE FINALS: Thunder lead series 3-2BOTTOM LINE: The Oklahoma City Thunder look to clinch the series over the San Antonio Spurs in game six of the Western Conference finals. The Thunder defeated the Spurs 127-114 in the last meeting on Wednesday. Shai Gilgeous-Alexander led the Thunder with 32 points, and Stephon Castle led the Spurs with 24.The Spurs are 36-16 against Western Conference opponents. San Antonio has an 8-5 record in games decided by 3 points or fewer.The Thunder have gone 41-11 against Western Conference opponents. Oklahoma City is third in the Western Conference scoring 119.0 points per game and is shooting 48.4%.The Spurs make 48.3% of their shots from the field this season, which is 4.6 percentage points higher than the Thunder have allowed to their opponents (43.7%). The Thunder are shooting 48.4% from the field, 3.3% higher than the 45.1% the Spurs’ opponents have shot this season.TOP PERFORMERS: Victor Wembanyama is averaging 25 points, 11.5 rebounds, 3.1 assists and 3.1 blocks for the Spurs. Devin Vassell is averaging 2.6 made 3-pointers over the last 10 games.Popular ReadsGilgeous-Alexander is …