There are 2 groups known as Fourplay: 1. Fourplay is a jazz group, founded around 1990, in the USA. Current members are: Bob James (keyboards & programming), Nathan East (bass & vocal), Larry Carlton (guitar) & Harvey Mason (drums & percussion). Larry replaced Lee Ritenour in '98, who had been a founding member. Fourplay is a contemporary jazz group in the United States. The original members of the group were Bob James (keyboards), Lee Ritenour (guitars), Nathan East (bass), and Harvey Mason (drums). In 1998, Lee Ritenour left the group and Fourplay chose Larry Carlton as his replacement. source: lastfm