Jonathan Park (Korean: 박성만Park Sung Man) (February 18, 1986), better known by his stage name Dumbfoundead, is anArgentine born American rapper of Korean descent originating from the Koreatown neighborhood of Los Angeles, California. Best known for his affiliation with GEE Los Angeles based hip hop collective Project Blowed, he has participated in the West Coast division of rap battle league Grind Time, and in Jumpoff's 2007 World Rap Championships; both of which have given rise to his status as a strong web presence. He has also done a a stint as the opening act for South Korean hip hop group Epik High's Map the Soul tour, and is also a member of the hip hop trio Thirsty Fish and Los Angeles battle crew Swim Team.
Born in Buenos Aires, Argentina to South Korean refugees, Jonathan Park (Korean name: 박성만Park Sung Man) was smuggled in along with his sister by his mother to Mexico, and then later settled in Koreatown in Los Angeles at the age of three. He was often seen as a class clown by his peers at an early age, and was exposed to hip-hop at age ten upon entering a community center inMacArthur Park and meeting emcees such as Mark Luv of Zulu Nation, Poppin' Chuck, Cre8 RTN, and Ezrock. This first experience with hip-hop allowed him to develop the technique of freestyling and to educate himself on hip-hop's history and roots. A year later, he was taken to Project Blowed, an open-mic workshop located in Leimert Park in South Central Los Angeles, by a high school friend. There he would continue to hone his abilities as an emcee amongst the influence of "Blowdians" such as Otherwize, Riddlore,NoCanDo, P.E.A.C.E., and many others, eventually earning the title of "Blowdian" himself. One of Dumbfoundead's signature lines is "Get your bars up, peace".
Park dropped out of John Marshall High School in his sophomore year, as a result of frequent truancy. After dropping out, Park moved into a one-bedroom apartment in the MacArthur Park area with his sister. Prior to initiating a full-time professional music career, he worked as a bail bondsman, among many other odd jobs in order to support the finances he needed to pay for his home
As a member of the Project Blowed collective, Dumbfoundead is also a part of the group Thirsty Fish along with "Blowdians" Open Mike Eagle and Psychosiz, and a larger group,Swim Team, with members Sahtyre, VerBS, Alpha MC, Open Mike Eagle, Lyraflip, Psychosiz, Rogue Venom, DJ Zo, Kuest One, Dos Tres, and Uhuru. In 2007 Thirsty Fish released the album Testing the Waters, and in 2008 Swim Team released Ocean's Eleven. May 10, 2011 Thirsty Fish released Watergate.
Under an independent label, DFD has released three albums: Super Barrio Brothers, Fun With Dumb and Clockwise. A solo album titled DFD was released on November 1, 2011.
Dumbfoundead frequently collaborates with other artists; including Epik High, a popular Korean rap/pop group. He is featured on two full length tracks on the Epik High album e, "Maze"  and "Rocksteady" , and was featured as the opening act for the USA Map the Soul Tour in 2009. Since its inception Dumbfoundead has been a regular performer at the annual Asian Hip Hop Summit. Dumbfoundead has performed with many other notable artists such as Atmosphere, Jin, Traphik, E-40, Drunken Tiger, Jay Park,The Living Legends, Aceyalone, GZA, Jeru the Damaja, Pigeon John, WC, Abstract Rude, Del, Myka 9, KRS One, Busdriver, and many others.
He has also had cameos in several works including DJ Honda's "Let it Out" featuring Rakaa Iriscience, Money Harm aka Marvin Moore in 2009, Abstract Rude's – "Thynk Eye Can" (featuring Aceyalone & Myka 9) in 2010, "Al Bundy" by Intuition in 2010, and the Fresh Coast Documentary in 2008.
Dumbfoundead's first popularized Grind Time battle was with fellow Asian emcee Tantrum and received high praise—achieving some of the highest numbers of views for Grind Time battles of its era. Many have attributed his victory to his relaxed swagger and sharp humor that has become synonymous with his style as a battler. He often competes in competitions with fellow Swim Team rapper Sahtyre. An example of this is the 2007 World Rap Championships.
With the Tantrum battle being his debut of Grindtime, Dumbfoundead went on to battle Illusion-Z, F.L.O., TheSaurus, and Pumpkinhead in the Grindtime circuit, losing only to two time World Rap Championship and Scribble Jam champion The Saurus.
Dumbfoundead is known as a comedic emcee for his jokes, disses, and rebuttals in battle. His videos have become quite popular through YouTube.
Park played a small role in the comedy/horror film titled Detention.
In early 2009, Dumbfoundead hosted 'Kollaboration Hip Hop' and was also an interviewer during the R16 B-boy Festival in Seoul, South Korea. He has been featured on CNN, NBC Los Angeles, Fox 11 and Gizmodo for spearheading the LA Underground scene and creating such pieces as Jam Session 2.0 (released on January 20, 2010), which networked 8 artists in different locations to create one song. His ongoing YouTube series, entitled "The Homies", features fellow artists and peers and allows them to showcase their abilities. Features include P.E.A.C.E. of Freestyle Fellowship, DJ Zo, Open Mike Eagle, and PK of Kollaboration.
In 2010, Dumbfoundead played a significant role in the creation of Knocksteady, a hip-hop collective based in Los Angeles. Knocksteady aims to "push new music and media to the masses via select musicians and artists to create a unique lifestyle brand that promotes positivity and originality without losing sight of the greater social power."
- Solo work
- Fun With Dumb (2009)
- DFD (2011) (#6 Heatseekers Albums, #41 Top R&B/Hip-Hop Albums, #24 Rap Albums) 
- Love Everyday EP (2012)
- Thirsty Fish
- Swim Team
- Oceans Eleven (2008)
- Other collaborations