Alex Rodriguez seen with Meghan Hayden at White Party

Former Major League Baseball star Alex Rodriguez was seen with a new romantic partner, fitness coach Meghan Hayden, at a high-profile Fourth of July celebration in the Hamptons last week, signaling his first public relationship since his breakup earlier this year. The pair attended media and sports executive Michael Rubin's annual "White Party" in Bridgehampton on July 1, where they were photographed together and shared a kiss.

Sources familiar with the situation confirm that Rodriguez and Hayden are dating and that the relationship is new. The two arrived at the star-studded event with a group of friends and spent much of the evening together. Observers noted that Rodriguez's companions helped deflect attention from other women who approached him, indicating he was there with a date. Hayden later posted photos from the "White Party 26" on her Instagram, including images with Rodriguez.

Hayden, 33, is a private fitness coach based in New York City. A former Division I college athlete, she graduated from the University of Miami with a degree in exercise physiology and runs her own training business. She has also done modeling work for athletic brands such as Under Armour and Athleta.