Lamar Odom has reportedly been packing on the pounds ever since the couple's infamous split.

Odom was spotted with a noticeably larger stomach on Saturday, June 21, as he was coming back from a workout session in Sherman Oaks, California. The 6-foot-10 basketball player was sporting a blue long-sleeve shirt, which was tucked into a pair of shorts, while carrying a couple of sweatshirts over his shoulder. He seemed to be out of breath and exhausted.

Khloe Kardashian made a final decision to end everything with her husband, following unpleasant allegations of his drug abuse and infidelity. The 34-year-old NBA player is apparently being uncooperative with signing divorce papers, which the "Keeping Up With the Kardashians" star filed nearly five months ago to dissolve the couple's four-year marriage. "While Khloé is very happy with French -- because he treats her like a queen -- she isn't fully able to enjoy it because Lamar still hasn't submitted a response in their divorce proceedings," a source revealed to RadarOnline.

After the pair's public separation, Khloé Kardashian is now romantically linked to rapper French Montana. However, she took to her Twitter account in May, writing: "It still hurts... Maybe it always will."

While Kardashian has been making effort to move on with her new love interest, Lamar Odom has been "blowing up her phone" with "desperate calls," but the 29-year-old reality TV personality has "been refusing to take his calls lately."

"Khloé is out in public with new guys all over them, and it is killing Lamar," another source told RadarOnline. "Yeah, he was totally with other women [first], but he doesn't want Khloé to shove it in his face that she is moving on. Lamar is jealous and gets mad when she refuses to talk to him."