Yep, David was on the Tonight Show on April Fool's Day. I was wondering if the segment was going to mention the injury problems last season, the pasting by Colorado on Saturday, but no - though they did get in a mention of Thursday's game versus San Jose.
It was a nice interview, though. David and Jay Leno are neighbors, and I think that helped David relax. They talked mostly about Victoria, actually.
The whole episode is up on the Tonight Show archive on the NBC site. David is the first guest.