Premise: Ralph Edward Tresvant Sr. (born May 16, 1968), also known as Rizz and Rizzo, is an American contemporary R&B singer best known as the lead singer of R&B/pop group New Edition. As a solo artist, Tresvant released the album "Ralph Tresvant" (1990). In 2008, he began touring with Bobby Brown and Johnny Gill in a new group named Heads of State.
Hypothesis:  Tresvant only played with Brown or Gill since 2008