About Kelvin Mercer
Kelvin Mercer, also known by his stage name Posdnuos, Plug 1 and occasionally Pos, is an American rapper and record producer from East Massapequa, New York, best known for his work as one third of the hip hop trio De La Soul. Through his work with the group, Mercer is considered to be one of the most consistent and underrated MCs of all time. Beginning with the highly acclaimed 3 Feet High and Rising in 1989, Mercer has gone on to release nine albums with De La Soul. Mercer's title of Plug One would eventually evolve into Plug Wonder Why, which would be shortened to a homophone of the original, Plug Won.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.