When it comes to celebrity sightings, Jupiter’s Roger Dean Stadium, the spring home of the Florida Marlins and St. Louis Cardinals, is no Staples Center, home of the L.A. Lakers.

But it wasn’t a wasteland Saturday afternoon.

Comic Jerry Seinfeld, with his three kids, wife Jessica and a nanny spent six and a half innings watching the Cards’ game against the New York Mets, two rows above the New Yorkers’ dugout. And in a luxury suite, legendary hoops coach Bobby Knight alternated between the NCAA tournament on the tube, and his dear Cardinals.

Seinfeld (left) with Mets Jerry Manuel Saturday at Roger Dean Stadium (Courtesy The Star-Ledger)

Wearing a 1980s Mets shirt, Seinfeld arrived with his clan an hour before the game, spywitnesses tell me, and stood behind the Mets’ batting cage.  The star of Bee Movie also shot the breeze with manager Jerry Manuel and outfielder Angel Pagan. First baseman prospect Ike Davis got Seinfeld’s autograph.

Seinfeld, behind third base Saturday at Roger Dean (Lynn Kalber/Special to Page2Live)

The actor was then escorted to his seat by cops. He bought a round of hot-dogs and fries, and the wife pulled out a plastic bag with homemade cookies.

Sporting a Cardinals hat, meanwhile, Knight, 69, watched the Villanova-St. Mary’s NCAA basketball game before venturing on the terrace for some baseball.