Lamar Odom has reportedly been missing for three days.
According to TMZ, Odom disappeared and his family has not been able to contact him for 72 hours.
TMZ also reports that sources say Odom has been facing a drug problem for two years, which he checked in for treatment for last year.
Odom reportedly stayed clean while playing for the Los Angeles Clippers this past season, but after the season was over, fell back into using drugs.
Sources tell TMZ that Odom's family allegedly tried to stage an intervention, but he refused.
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Odom's wife Khloe Kardashian kicked him out of the house on Wednesday and the NBA star hasn't been seen since, notes TMZ.
"It's a really hard time for Khloe. She's kept this secret for almost two years trying to save Lamar and their marriage," an unnamed source told People.
In response, Kardashian wrote on Twitter today: "Really hard to sit here and listen to people talk s--- about my family! F--- you and shame on you! I'm too protective for this s---!"
An unidentified source told The Huffington Post late today that Odom "is not missing," but did not say where he is.