1. Oklahoma City Thunder (27-7; last week's ranking: 1): The Thunder are 4-2 since guard Russell Westbrook had knee surgery. Replacement Reggie Jackson scored a career-high 27 points in a win over Boston on Sunday.
2. Miami Heat (26-8; last week's ranking: 2): LeBron James played in his 250th game with the Heat in Sunday's win over Toronto. He's scored in double figures in all of them.
3. Indiana Pacers (27-6; last week's ranking: 3): The Pacers have won seven of their past eight games. Only loss was to the Raptors, which play the Pacers again on Tuesday in Indianapolis.
4. Portland Trail Blazers (26-8; last week's ranking: 4): C.J. McCollum averaged 18.5 points in 20.5 minutes in two games with D-League Idaho. The rookie's NBA debut could come Tuesday at Sacramento.
5. San Antonio Spurs (26-8; last week's ranking: 5): Starting center Tiago Splitter, who is averaging 8.6 points and 6.2 rebounds, is out three to five weeks with a sprained right shoulder.
6. Golden State Warriors (23-13; last week's ranking: 8): The Warriors' nine-game win streak is their longest since they won 10 straight in 1975. Golden State also has winnable games ahead against Milwaukee, Brooklyn, Boston and Denver.
7. Houston Rockets (22-13; last week's ranking: 7): Dwight Howard faces the Lakers again on Wednesday, but won't return to play them in Los Angeles for the first time until Feb. 19.
8. Los Angeles Clippers (23-13; last week's ranking: 6): The Clippers will be without point guard Chris Paul for up to six weeks because of a shoulder injury. The offseason signing of point guard Darren Collison will pay off.
9. Phoenix Suns (20-12; last week's ranking: 9): Good move by the Suns who expect to sign free-agent guard Leandro Barbosa to a 10-day contract Monday, according to the Arizona Republic.
10. Dallas Mavericks (19-15; last week's ranking: 10): The Mavericks dropped their fourth straight home game on Sunday against struggling New York. Dallas is 4-6 at home after winning its first seven home games.
11. Atlanta Hawks (18-16; last week's ranking: 11): The Hawks are 2-3 since losing Al Horford to injury. With a tough schedule ahead, Atlanta could soon slip to a losing record.
12. Minnesota Timberwolves (16-17; last week's ranking: 12): Rookie swingman Shabazz Muhammad was sent to the D-League Iowa Energy with the arrival of the D-League Showcase in Reno.
13. Toronto Raptors (16-16; last week's ranking: 21): The Raptors' five-game win streak ended with a loss to the Heat on Sunday. Toronto will soon be the third-best team in the Eastern Conference.
14. New Orleans Pelicans (15-17; last week's ranking: 14): Ryan Anderson, now sidelined after suffering a cervical stinger, is averaging an NBA-best free-throw percentage of 95.6.
15. Memphis Grizzlies (15-18; last week's ranking: 15): Without Marc Gasol, the Grizzlies continue to alternate wins and losses, going 3-2 in their past five.
16. Denver Nuggets (16-17; last week's ranking: 13): Andre Miller becomes eligible to play on Tuesday against Boston after serving a two-game suspension.
17. Los Angeles Lakers (14-20; last week's ranking: 16): The Lakers' trade talks involving Pau Gasol aren't limited to the Cavaliers.
18. Charlotte Bobcats (15-20; last week's ranking: 17): Center Al Jefferson has averaged 20.4 points, including a season-high 27 at Sacramento, and 11.8 rebounds the past five games.
19. Chicago Bulls (14-18; last week's ranking: 23): Chicago has a chance to win three in a row for the first time since a five-game streak from Nov. 8-18 with Derrick Rose.
20. Philadelphia 76ers (12-21, last week's ranking: 29): The Sixers have played well of late, winning four-straight games. They certainly don't look like a team expected to compete for the No. 1 pick in the 2014 NBA draft.
21. Washington Wizards (14-17; last week's ranking: 20): The Wizards have dropped three straight games and six of their past seven. A three-game road trip to Charlotte, New Orleans and Indiana is next.
22. Detroit Pistons (14-20; last week's ranking: 18): What's wrong with Detroit? The Pistons have dropped four straight overall and five in a row at home. Detroit is 4-10 after starting 10-10.
23. Brooklyn Nets (12-21; last week's ranking: 26): The Nets are seeking their second three-game win streak on Monday at Atlanta. Golden State and Miami visit Brooklyn this week.
24. New York Knicks (11-22; last week's ranking: 28): The Knicks went 2-1 in the Texas Triangle against San Antonio, Houston and Dallas with Iman Shumpert averaging 20.6 points.
25. Sacramento Kings (10-22; last week's ranking: 19): It appeared the Kings might be turning the corner with wins over Miami and Houston – until they lost at home to Philadelphia and Charlotte.
26. Boston Celtics (13-21; last week's ranking: 22): After losing at Oklahoma City on Sunday, the Celtics continue a tough West road trip at Denver, the Los Angeles Clippers, Golden State and Portland.
27. Utah Jazz (11-25; last week's ranking: 24): The Jazz will be active in trade talks with a handful of veterans in the last years of their deals including Richard Jefferson, Marvin Williams and Brandon Rush.
28. Cleveland Cavaliers (11-23; last week's ranking: 25): Center Andrew Bynum is still working out at the team facility, but it's doubtful the Cavs won't cut or trade him by Tuesday's deadline for his contract to be guaranteed for the remainder of the season.
29. Orlando Magic (10-23; last week's ranking: 27): Glen "Big Baby" Davis married his longtime fiancée Jenna Gomez on New Year's Eve. They met when he was a rookie with the Celtics.
30. Milwaukee Bucks (7-26; last week's ranking: 30): How will Larry Sanders respond on the court after teammate Gary Neal questioned whether he's earned his money?