Donald George Ruffin, known professionally as Duwap Kaine, is an American rapper, singer, and songwriter. He is known for his projects Underdog and Bad Kid from the 4, as well as his early collaborations with record producer Pi'erre Bourne.
Career Ruffin began making chopped and screwed remixes of songs at age 6. He started producing music using Mixcraft. He released "Elmo freestyle", which later became a viral hit, at age 9. As a teenager, he began releasing music under the alias "Dolphin God". He released his debut mixtape in 2013 under the DolphinGod alias.
One of his first singles to gain attention was the song "A Stove Is a Stove", which he released in 2016, with the song since reaching over a million plays. In 2017, he released the Pi'erre Bourne-produced song "Santa". In September 2017, he was co-signed by American rapper Lil Yachty as one of his favorite rappers. Ruffin has worked with artists including Trippie Redd, K$upreme, Lil Wop, and Lil Tracy. He released two mixtapes that year, Friends Till The End & Forever Kaine.
In 2018, he released the notable mixtape Underdog. Most of the tape's instrumentals were made by Duwap's frequent collaborator Nine9. Ruffin released the single "Playin Wit Da Autotune" on August 11, 2021. Ruffin released his album Faith Like Esther on June 26, 2022. In December 2024, he released A Kid From Savannah, a short autobiography. He released his mixtape The Godfather in March 2026.
Musical style His music is known for its "melodic, autotune-soaked raps". Pigeons and Planes has described him as a "godfather of internet rap". He has cited Chief Keef, Soulja Boy, and Lil B as influences on his music.
Personal life As of 2026, Ruffin lives in Lawrenceville, Georgia. He was diagnosed with ADHD as a child. He has a daughter.
Discography Studio albums TitleAlbum detailsWhat a Time to Be Wild Released: October 9, 2015 Label: Self-released Format: Digital download, streamingBad Kid from the 4 Released: February 21, 2020 Label: Self-released Format: Digital download, streamingUnderdog 2 Released: June 10, 2020 Label: Self-released Format: Digital download, streamingThank You Kaine Released: September 1, 2020 Label: Self-released Format: Digital download, streamingAfter the Storm Released: 2015 Label: Self-released Format: Digital download, streamingA Dogg's Influence Released: March 7, 2022 Label: Self-released Format: Digital download, streamingFamily Guy Released: September 16, 2022 Label: Self-released Format: Digital download, streamingDuwap So Based Released: May 21, 2023 Label: Self-released Format: Digital download, streamingDarkest Days Released: July 17, 2023 Label: Self-released Format: Digital download, streamingYou Influenced Me Released: August 16, 2023 Label: Self-released Format: Digital download, streamingOn The Way Released: September 27, 2023 Label: Self-released Format: Digital download, streamingBully Released: November 9, 2023 Label: Self-released Format: Digital download, streamingThank You Kaine II Released: December 3, 2023 Label: Self-released Format: Digital download, streamingGoldmine Released: March 26, 2024 Label: Self-released Format: Digital download, streamingThank You Kaine 3 Released: June 21, 2024 Label: Self-released Format: Digital download, streamingDouble YL (You Live You Learn) Released: August 28, 2024 Label: Self-released Format: Digital download, streamingI Am Not A Human Being Released: October 23, 2024 Label: Self-released Format: Digital download, streamingNobody Is Coming To Save You Released: January 1, 2025 Label: Self-released Format: Digital download, streaming
Deluxe albums TitleDeluxe detailsAfter the Storm (Deluxe Version) Released: June 17, 2021 Label: Self-released Format: Digital download, streaming
Mixtapes TitleMixtape detailsTrappin Fever Released: November 29, 2015 Label: Self-released Format: Digital download, streamingTrappin Fever 2 Released: December 27, 2015 Label: Self-released Format: Digital download, streamingKaine's Collection Released: January 26, 2015 Label: Self-released Format: Digital download, streamingFourteen Released: February 21, 2016 Label: Self-released Format: Digital download, streamingKaine's Mansion 5 Released: April 15, 2016 Label: Self-released Format: Digital download, streamingCitgo Stories Released: May 11, 2016 Label: Self-released Format: Digital download, streaming88 Kaine Released: July 2, 2016 Label: Self-released Format: Digital download, streamingCandy Kaine Released: September 10, 2016 Label: Self-released Format: Digital download, streamingFriends Till the End Released: February 1, 2017 Label: Self-released Format: Digital download, streamingForever Kaine Released: August 19, 2017 Label: Self-released Format: Digital download, streamingUnderdog Released: July 4, 2018 Label: Self-released Format: Digital download, streamingHeardhead Released: October 13, 2021 Label: Self-released Format: Digital download, streamingFaith Like Esther Released: June 26, 2022 Label: Self-released Format: Digital download, streamingKaine's Diary Released: August 26, 2022 Label: Self-released Format: Digital download, streamingUnderdog 3 Released: October 25, 2022 Label: Self-released Format: Digital download, streamingWarning B4 Destruction Released: December 16, 2022 Label: Self-released Format: Digital download, streamingRemember Who Started the Wave Released: January 6, 2023 Label: Self-released Format: Digital download, streamingFeels Like Summer Released: June 3, 2023 Label: Self-released Format: Digital download, streamingSouthside's Most Wanted Released: May 18, 2024 Label: Self-released Format: Digital download, streamingLost Files, Vol. 1 Released: September 30, 2024 Label: Self-released Format: Digital download, streamingDown South Down 2 Earth Released: November 10, 2024 Label: Self-released Format: Digital download, streaming
Extended plays TitleExtended play detailsMr. 4 Released: November 22, 2019 Label: Self-released Format: Digital download, streamingFreeLilEBG Released: March 3, 2022 Label: Self-released Format: Digital download, streamingMistreated Released: April 1, 2024 Label: Self-released Format: Digital download, streamingKaine's Laboratory Released: July 25, 2024 Label: Self-released Format: Digital download, streaming
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