On Saturday, June 6, Matthew was in Marietta, GA signing autographs for B.P. Sports Collectibles. The Marietta Daily Journal has posted an article about the event.
Talking about autograph signings, Matthew will be signing autographs at a private signing event for Legends Sports & Games sometime in June. No word yet on the exact date.
Plus some articles and a video
FreeP.com - Calvin Johnson: Offense looking good
Scout.com - Stafford shinning
NFL.com - Offseason spotlight
NFL.com - Onwards and upwards? (video)