OKC Thunder jersey history No. 44 - Greg Foster (1999-2000)The Oklahoma City Thunder (and the Seattle Supersonics before them) have 51 jersey numbers worn by the players who have suited up for the franchise since its founding at the start of the 1967-68 season. To commemorate the players who wore those numbers, Thunder Wire is covering the entire history of jersey numbers and the players who sported them since the founding of the team. The ninth of those players who did so in the Seattle SuperSonics era, big man alum Greg Foster. During his time suiting up for the Sonics, Foster wore only jersey No.