David West scored 21 points and Lance Stephenson had his league-best fifth triple-double of the season, leading Indiana past Oklahoma City 102-97 Sunday - putting the Pacers one win away from clinching the Eastern Conference's top seed.
The Pacers (55-26) lead two-time defending champion Miami by a half game with one to play and hold the tiebreaker based on conference record.
Kevin Durant finished with 38 points for Oklahoma City (58-22) on a day it could have locked up the second seed in the West.
Oklahoma City rallied from a 10-point fourth-quarter deficit, tying the score at 89 with 2:46 to go. But Paul George hit a 3 and Stephenson made one with 34.2 seconds to go to make it 97-91.