Houston led by five at the end of the first quarter and was up by three points early in the second before Oklahoma City scored 12 straight points, fueled by seven from Durant. The Rockets took a 43-34 lead about 6 1/2 minutes before halftime.
Delfino swiped the ball from Durant and swished a 3 with 17 seconds left in the first half to cut the Thunder’s lead to 60-53 at halftime.
The Rockets led 29-24 after one quarter thanks to 5-of-9 shooting from 3-point range on Monday after trailing by 20 points after one in Game 3.
NOTES: Houston’s Greg Smith returned Monday after missing Game 3 with a stomach ailment. ... Durant has scored 20 or more points in 30 straight playoff games. ... Former Rockets star Steve Francis watched the game from a courtside seat. ... The Seattle Supersonics were the last team to sweep Houston in the playoffs, getting a 4-0 series win in the Western Conference semifinals in 1996.