In a new promo for season 4 of The Hills, Lauren Conrad has a new guy, baseball player Doug Reinhardt. But as quickly as it started, it has ended for Lauren Conrad and her baseball beau Doug Reinhardt, who’s featured in the upcoming season of The Hills.

A pal of Reinhardt’s says he realized things were over with Conrad at a recent birthday barbecue for Hills star Audrina Patridge (which other sources say will air on the show). “Brody [Jenner], Frankie [Delgado] and Doug got upset that Stephanie Pratt was there. Doug and Lauren got into a fight about it,” says the pal. “He just decided he’s over it. He thought that Lauren’s gotten a bit of a big head and didn’t like he way he felt he was being portrayed on the show.”

Reinhardt isn’t wasting any time easing back into the game. The minor leaguer for the Baltimore Orioles was recently spotted out to dinner with his longtime ex-girlfriend Allie Lutz, 22, a USC graduate, at L.A.’s STK and again Tuesday at the Coco de Ville lounge opening in LA.

In fact, Reinhardt’s been spotted getting cozy with a bevy of ladies all around town. At Goa in March, he chatted and exchanged numbers with a tall blonde. The next day at the Better Bacon-hosted bungalow to celebrate the artwork of disabled children, Reinhardt picked up another number. With pal Brody Jenner by his side, Doug immediately took notice of a beautiful brunette and asked for her number, to which her response was, “Buy a piece of art.” Not only did Doug buy a piece of art, he picked out three different pieces in just 10 minutes!

Reinhardt and Conrad briefly dated in high school (when he and Lutz were on a break) but things recently started up again at the suggestion of his pals. “Frankie thought that it would be a great idea if Doug and Lauren dated, he thought they were a good match,” says the pal.

The source says things officially ended earlier this month with an on-camera split, “Lauren went over to Doug’s house to officially breakup on camera.” Says the source, “I have a feeling you won’t be seeing them together anytime soon.”