Cameron Diaz, Alex Rodriguez Back On!

Credit: Kevin Winter/Getty Images for Paramount Pictures; Alexander Tamargo/Getty Images

The game isn't over yet!

Just one month after their dalliance cooled down, Cameron Diaz and New York Yankees slugger Alex Rodriguez were spotted getting cozy over dinner at a West Hollywood private members' club Nov. 17.

"They looked super couple-y," an insider tells the new Us Weekly. "Cameron was holding his hand and nuzzling him."

But friends say the reconciliation shouldn't come as a surprise. "They break up and get back together all the time," notes a source close to Rodriguez, 35, and Diaz, 38. (The pair parted ways in October because "they needed space," the insider explains.)

And though the actress was recently linked with Glee's Matthew Morrison -- the two hung out Oct. 23 at L.A. lounge Bardot -- that fling has sizzled, the source says.

"She's definitely not into Matthew."