Kelvin Mercer

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Posdnuos2 (300dpi).jpg
Mercer performing at the Fillmore in San Francisco, July 2009
Background information
Birth nameKelvin Mercer
Also known as
  • Posdnuos
  • Mercenary
  • Plug One
  • Sop Sound
  • Plug Wonder Why
  • Pos
Born (1969-08-17) August 17, 1969 (age 49)[1]
The Bronx, New York, U.S.
GenresHip hop
Years active1987–present
LabelsTommy Boy, Sanctuary, AOI
Associated actsDe La Soul

Kelvin Mercer (born August 17, 1969)[1] is a rapper, producer, and one-third of the hip hop trio De La Soul. He is known more famously by his alias Posdnuos, or simply Pos. He was born in the Bronx, New York and grew up in East Massapequa, New York.[2]

Mercer and David Jude Jolicoeur were childhood friends. They met Vincent Mason in the early 1980s while attending Amityville High School in Long Island, New York. Mercer's father was a jazz fan.

As a member of De La Soul, Mercer is generally regarded as one of the most consistent and underrated MCs of all time.[3]

He is a member of the Spitkicker collective.[citation needed]

Cameos and album appearances[edit]

Year Album Notes
1998 Propellerheads' Decksandrumsandrockandroll, on the track "360° (Oh Yeah?)" With De La Soul
2002 Mint Royale's Dancehall Places and Pop Is..., on the track "Show Me"
2006 Oh No's Exodus into Unheard Rhythms, on the track "Smile a Lil Bit"
2007 LA Symphony's Unleashed, on the track "Universal"
2008 Jake One's White Van Music, on the track "Oh Really" With Slug of Atmosphere
2009 Dan Le Sac Vs Scroobius Pip's re-release of Thou Shalt Always Kill
2011 Official remix of Mac Miller's song "Of The Soul"
2013 Wrekonize's The War Within, on the track "Church Road"
2014 Stalley's Ohio (Stalley album), on the track "Navajo Rugs"
2015 Étienne de Crécy's Super Discount 3, on the track "WTF" With Dave
2015 Hot Chip's Why Make Sense?, on the track "Love Is the Future"
2017 Gorillaz' Humanz, on the track "Momentz" With De La Soul


All three members of De La Soul have used a number of aliases. The following are the most significant:

  • Posdnuos – Pronounced "pas-da-noos". The name may be a combination of the reversed words "Sop," meaning "leftover," and "Sound," a name Mercer went by while acting as a high school DJ. According to some sources, the fact that the words spelled backward are "sounds op [i.e., operative]" is intentional. [4]
  • Plug One – An early concept for 3 Feet High and Rising involved music being transmitted from Mars by three microphone plugs (each one representing a member of the group). Though this idea was abandoned, the titles "Plug One", "Plug Two" and "Plug Three" still became relevant on the album. Mercer's title of Plug One would eventually evolve into Plug Wonder Why, which has been shortened to Plug Won.
  • Mercenary – Derived from the last name, "Mercer". This name was given to him by DCQ, brother of Mos Def.[5]
  • P-Pain – Caricature of the rapper T-Pain. He uses this alias in the song Supervillainz by DOOM.


  1. ^ a b
  2. ^!113012-music-de-la-soul
  3. ^ DJ Shadow (September 23, 2011). "DJ Shadow: The Internet Is Not Your Savior". Retrieved September 23, 2011.
  4. ^
  5. ^