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Well, that didn't take long. One day after Khloe Kardashian filed for divorce from Lamar Odom, her basketball-playing husband of four years, she's been linked to yet another professional athlete. The bachelor in question is easy-on-the-eyes baseball star Matt Kemp, whose dating history includes a 2010 dalliance with Rihanna.

The evidence, such as it is: Paparazzi snapped Khloe, 29, driving behind Kemp, 29, as they headed to a Los Angeles gym on Friday. The L.A. Dodgers star also posted an Instagram pic on Thursday showing the soaring Christmas tree decorating the Kardashian family estate in Calabasas, Calif. The caption: "Best time of the year!! It's gonna be a Cali Christmas this year." Kris Jenner posted an identical photo earlier in the week.

The pair were also spotted -- separately -- at Jay Z's concert on Monday in Los Angeles, where Kardashian avoided fellow attendee Odom, and at John Legend's Dec. 1 performance. According to Radar Online, they hung out in the VIP area of Drake's Nov. 25 concert in L.A.

Their acquaintance dates back more than a year. In October 2012, Khloe was photographed shaking hands with Matt during a Los Angeles Clippers game, where she sat courtside cheering on Odom. It's unclear if that was the first time they'd met.

Insiders, however, deny they're an item.

"They are just friends and have been for a long time," a spy tells People. "Khloe is absolutely heartbroken right now and dating someone is the last thing she's thinking about."

Chimes in another confidant, "It could be heading [romantic] in the future, but Khloe wasn't spending time with him when she was still with Lamar. She absolutely wasn't. People need to remember that she and Lamar haven't lived together since June."

As for the NBA-er, it seems he reacted the same as everyone else to the divorce filing: with zero surprise.

"Lamar expected this," a source explains to Us Weekly. "He's fine with it. He just wants it over swiftly and smoothly now. He's had time to come to terms with it."

He may also be trying to point the finger. TMZ says Odom is telling pals that Khloe "brings out the bad side of me."