"Petey B." is one of the soldiers/associates of the Lupertazzi crime family tasked with taking out Silvio Dante. He is driving the car with "Ray Ray" in it and successfully traps Dante and Patsy Parisi in the Bada Bing! parking lot. "Ray Ray" would have fired more at Silvio and perhaps gone after Patsy except that he ran out of bullets. Leaving the parking lot in a hurry, Petey accidentally causes a massive crash, wherein a motorcyclist falls from his bike and it hits other moving vehicles.
Petey B. is played by and named after Pete Bucossi, the stunt coordinator on the show ever since the pilot episode.