Credit: Splash News/Us Weekly

The new issue of Us Weekly has the first pic of Jessica Simpson and her newest guy, Eric Johnson.

He's a former NFL player -- and still legally married!

The two began dating five weeks ago, shortly after pals brought Johnson -- who retired in 2008 after an injury-plagued career as a tight end for the New Orleans Saints and San Francisco 49ers -- to a party at Simpson's Beverly Hills' home.

VIDEO: Jess loses it while praying with a monk at a Buddhist temple

"Jess is definitely rushing into this," an insider tells Us. Indeed, in the photo, the couple are in Jacksonville, Fla., where they were celebrating Johnson's grandparents' 60th wedding anniversary!

When not hanging out with his entire family, Simpson and Johnson, who filed for divorce from his wife of five years, Keri, in January, made time for some serious PDA at the modest, family-friendly Ponte Vedra Inn & Club at which they were staying.

While strolling to their modest apartment there, "Her hand was on his butt, and they walked slowly just to enjoy the moment... They looked cute together," says an insider, who also adds that they spent time with a "Do Not Disturb" sign on the door.

Simpson -- who dyed her hair dark when she dated John Mayer and became a major sports fan when she was hooking up with Tony Romo (who famously dumped her last July 10, on her 29th birthday) -- has already altered her lifestyle for her New Age-leaning, yoga-loving man.

"Shocked my system with a vegan diet, special Pu-erh tea from China and cupping since Friday," she Twittered on June 27.

For more details on how Johnson likes to "have control" over Simpson, why she may not care because "she's desperate" not to be alone, and why he has a reputation as a "player," pick up the new issue of Us Weekly, on stands today.