Jason Adam Griffith (born November 29, 1980) is a voice actor who was best known as the voice of Sonic in the Sonic the Hedgehog series. He also voices Shadow the Hedgehog and Jet the Hawk as well. He has voiced Sonic and Shadow in both Mario & Sonic at the Olympic Games and Mario & Sonic at the Olympic Winter Games and voiced them one more time in Super Smash Bros. Brawl. But later in the year 2010, SEGA announced they were replacing the entire voice cast. He was replaced by Roger Craig Smith who now voices Sonic and was replaced by Kirk Thornton who now voices Shadow in Mario & Sonic at the London 2012 Olympic Games. And he was also replaced by Michael Yurchak who now voices Jet the Hawk. He is currnetly now on the Pokémon anime series voicing Ash' traveling companion Cilan.