Lamar is expected to release a statement admitting his addiction to the prescription meds, confirming Radar's bombshell report.
Khloe Kardashian's hubby left rehab after about three weeks and was clean for last season with the Los Angeles Clippers, according to reports.
But the two-time championship sixth man allegedly returned to hardcore recreational drug use, it’s claimed, around the same time he was linked to two extramarital affairs.
Media reports of Lamar's use of "crack cocaine are false. Lamar's vice has been Oxycontin," a source told Radar.