The NBA baller stepped out in Los Angeles Sunday, looking pensive as he hopped out of a white car, rocking a navy blue sweatshirt, jogging pants and sneakers.
It was one of the first times the athlete has been spotted without his wedding ring since the couple started facing relationship troubles earlier this year.
Saturday night, Odom was snapped hanging out in Hollywood with a male friend, hitting AV nightclub in a multi-colored jacket, denim jeans, and a T-shirt that had a picture of a raven-haired woman on it.
The Keeping Up With the Kardashians star filed for divorce from Odom on Dec. 13, citing irreconcilable differences.
Khloé also petitioned to legally drop Odom from her name. She is not asking for spousal support and is looking to have a judge prevent Odom from getting support from her as well.
A source told E! News Lamar is "deeply saddened" by Khloe's decision to file for divorce. "He knew it was coming and it was only a matter of time. He felt like he gave his all to try and save the marriage, but ultimately he wasn't able to."
The E! reality star hit Twitter recently to ask for privacy in the wake of the filing, writing on Dec. 18, "This, in and of itself, is heart breaking and torture to my soul. Please, I don't need the extra rumors and BS right now."
The Khloé & Lamar stars were married for four years.
—Additional reporting by Michelle Falls