An eco-friendly, on-foot John Mayer traipsed around New York yesterday -- and said nothing about his latest soup-of-the-Diaz. Secret keepers are sexy!
The hushed soft rocker, double strappin' a backpack, didn't give our photog any audio, but a loud-mouthed pedestrian chimed in with a nice "Who is that guy?"
Why, that's the guy who's said to have dated Mandy Moore ... and Jennifer Love Hewitt ... and Jessica Simpson. Who indeed!