The 45-year-old ex-Yankee, who was previously engaged to Affleck's girlfriend Jennifer Lopez, was seen at the Saturday Night Live producer's intimate backyard birthday party in the Hamptons over the weekend.
In a video obtained by Page Six, A-Rod can be seen awfully close to 41-year-old Shookus.
The slugger and Affleck's ex sat right next to each other while Josh Beckerman, better known as "Foodie Magician," performed a magic trick for the group.
In the clip, Shookus is dressed to kill. She's seen wearing a black halter top and a patterned white and black skirt.
A-Rod kept it clean, wearing an all-white getup to celebrate summer.
While everyone -- including the birthday girl -- seemed to enjoy the Foodie Magician's tricks, the ex-MLB star looked more interested in his phone than the antics going on at the table.
A-Rod's hangout with Shookus immediately sounded alarm bells with many fans wondering if the ex-Yankee and Affleck just simply swapped exes.
However, Page Six reports there is nothing romantic going on between the two.
“There is absolutely zero there,” A-Rod's rep told the outlet. “They’ve been friends for 15 years.”
Affleck dated Shookus on and off for two years from 2017 to 2019.
J Lo famously ended her two-year engagement to A-Rod in April amid rumors he cheated on her with Southern Charm star Madison LeCroy.
The Love Don't Cost a Thing singer moved on pretty fast.
Weeks after calling it quits with A-Rod, J Lo was seen in Montana with Affleck. The two have been inseparable since and were even caught making out during a family dinner with her 13-year-old twins -- Max and Emme.
Affleck has seemingly taken over A-Rod's place as stepdad seamlessly.
"Ben and her kids seemed comfortable together," an insider told PEOPLE about the dinner. "The kids kept chatting with Ben. Ben seemed great. He was smiling and laughing. They ordered a lot of food to share. Ben had a Diet Coke."
While J Lo's clearly moving on, A-Rod might still be holding onto something.
As Radar reported, he is currently renting a home in the Hamptons that is just three minutes away from his ex.