MotoGP stars Chris Vermeulen and Jorge Lorenzo, AMA stars Ben and Eric Bostrom and Red Bull Rookies Cameron Gish, Toriano Wilson and Joey Pascarella signed autographs today at the Hard Rock Cafe in San Francisco, promoting this weekend’s Red Bull U.S. Grand Prix at Mazda Raceway Laguna Seca. More, from a press release issued by Mazda Raceway Laguna Seca: Fans met some of the riders from the Red Bull U.S. Grand Prix in San Francisco at Fisherman’s Wharf yesterday. It was a rare opportunity to meet the riders from MotoGP, AMA Superbike and the Red Bull U.S. Rookies Cup together, first-hand, before the race. Riders on hand were Chris Vermeulen, Rizla Suzuki; Jorge Lorenzo, Fiat Yamaha; Ben Bostrom, Yamaha AMA Supersport; Erik Bostrom, Yamaha AMA Superbike. The Red Bull AMA U.S. Rookies Cup riders Joey Pascarella, Cameron Gish and Toriano Wilson joined the veterans