- Every Thursday at 8:40am, it's your chance to take part in the John DeBella Show's 'Grover Knows' feature. Here's how it works…3 listeners will get the opportunity to tell a joke on-air. When telling the joke, the listener leaves out the punchline to see if they can stump Grover or if he can prove that he 'knows' the joke.

To get the chance to read your joke on-air, listen on Thursday morning between 6am and 8:35a for the DeBella Show to tell listeners to call 215-263-WMGK (9645) with their 'Grover Knows' joke.

If you are picked to read your joke on-air, regardless of whether you stump Grover or not, you'll receive this week's prize :

A four pack of run of engagement passes to see the film GANGSTER SQUAD

 Ruthless mob king Mickey Cohen runs the show in Los Angeles, 1949 but a small, secret crew of LAPD outsiders who come together to try to tear Cohen’s world apart. In Theaters now