Isaac Henry Sedric Fontaine IV[1] (born April 16, 1975, in Sacramento, California) is an American professional basketball player. He is 1.94 m and 95 kg guard and he played collegiately at Washington State University. He has played in the NBA for the Memphis Grizzlies during the 2001–02 season, playing six games. The following season, in 2002–03, he played with the Mobile Revelers of the NBA Development League.