The Thunder, who are currently without center Nerlens Noel, are “actively pursuing” backup big men, Keith Smith of Yahoo Sports hears (Twitter link).

As Smith notes, Oklahoma City is averse to taking on much – if any – money due to luxury tax concerns. Currently, the team’s tax bill projects to be easily the highest in the NBA. Still, the Thunder feel they need at least one more big man to their roster for the postseason, Smith adds.

Noel has been a solid backup center for the Thunder this season behind Steven Adams, but took a scary fall during Tuesday’s loss to the Timberwolves and was diagnosed with a concussion. Noel appears to have avoided a more serious injury, such as a fracture, but his recovery timeline is up in the air. He’ll need to show that he’s symptom-free before he can resume basketball activities.