Lamar Odom was spotted at a sushi restaurant in L.A. after leaving rehab one day earlier Credit: Jason LaVeris/FilmMagic

Lamar Odom is back on the map. After days of conflicting reports regarding the athlete's whereabouts, Khloe Kardashian's husband was spotted on Friday, Sept. 6, at L.A. sushi restaurant Octopus, a hostess confirms to Us Weekly.

The hostess notes that Odom stopped by the eatery with a male companion. "He didn't look very happy," she tells Us.

Given what's happening in his life right now, that's not surprising. As previously reported, the basketball player has been battling a serious substance abuse problem in recent months. It was widely reported on Wednesday, Sept. 4, that Odom had checked himself into rehab, but an insider told Us he checked back out the next day.

Even Kardashian was unsure of where her husband was or what he was doing this week. "Khloe doesn't know where Lamar is," a source close to the reality star, 29, told Us on Thursday, Sept. 5. "She's just exhausted. I don't think anyone knows where he is at this point."

The source added: "She's not fazed by these reports. She doesn't believe it, she doesn't think he went to rehab. Khloe is so exhausted by everything. She doesn't know what's going on."