Leno: "Ricky Williams quit the team, an…

Leno: "Ricky Williams quit the team, and one of the reasons he retired from the NFL at age 27 is because he wants to continue smoking marijuana. Well, at least he had a good reason. I think people knew there was a problem when they asked him, ‘Do you prefer Astroturf or grass,’ and he said, ‘I never smoked Astroturf.‘"