Romanowski's Nutrition53 supplement will be the primary sponsor for 10 races this year, and will be an associate sponsor on the car driven by David Stremme in the remaining 26 events.
Romanowski was a two-time Pro Bowl selection and played in five Super Bowls during his stints with San Francisco and Denver.
He joins a NASCAR team that's been overhauled since Brandon Davis purchased the assets last year. Davis has added personnel and vowed to run the car in every race and not "start-and-park."
Nutrition53 is a line of supplemental health drinks and vitamins.