Thunder F Serge Ibaka out for postseason with calf injury

Los Angeles Clippers forward Blake Griffin, center, has his shot blocked by Oklahoma City Thunder center Steven Adams, right, of New Zealand, as forward Serge Ibaka, of Congo, defends in the first half of Game 6 of the Western Conference semifinal NBA basketball playoff series, Thursday, May 15, 2014, in Los Angeles. (AP Photo/Mark J. Terrill) (The Associated Press)

Los Angeles Clippers forward Blake Griffin, below, dunks as Oklahoma City Thunder forward Serge Ibaka, of Congo, defends in the first half of Game 6 of the Western Conference semifinal NBA basketball playoff series, Thursday, May 15, 2014, in Los Angeles. (AP Photo/Mark J. Terrill) (The Associated Press)

Thunder forward and defensive specialist Serge Ibaka will miss the rest of the NBA playoffs because of a left calf injury.

Ibaka underwent an MRI on Friday, one day after Oklahoma City eliminated the Los Angeles Clippers and advanced to the Western Conference finals against the Spurs. Game 1 is Monday night in San Antonio.

Ibaka was injured during the third quarter of Thursday night's win.

Ibaka's athletic ability and mid-range jumper have been keys for the team. He averaged 12.2 points, 7.3 rebounds and 2.2 blocks in 13 postseason games. During the 2013-14 regular season, he notched career-highs with 15.1 points and 8.8 rebounds while leading the league in total blocks for the fourth consecutive season with 219.