Nate Schierholtz made an appearance at the Sports Gallery in Walnut Creek, CA on April 24, 2010. I had him sign an older Adirondack bat. Around 100 tickets were sold for the event and Nate signed bats, balls, photos, etc.
Nate is a cool dude. Probably the friendliest athlete I've met at an event. He shook hands, stood up to pose for photographs, and was pretty amused by the old school bat I brought for him to sign.