Douglas William Krum, Jr. (born April 27, 1977), who goes by the stage names Krum, formerly he used the stage names Playdough and Harry Krum, is an American hip hop and musician. He's released seven studio albums, one extended play and two mixtapes in his career.

He started his music recording career around 2000, when his first studio album, Lonely Superstar, was released by UpRok Records on October 22, 2002. His second studio album, Don't Drink the Water, was released on October 17, 2006, from 7Spin Music. The subsequent release, Goodonya, an extended play, was released by Deepspace5 Recordings on December 18, 2008. His next release, a mixtape entitled Bible Bus, was released independently on June 29, 2010. His third studio album, Writer Dye, was released on November 2, 2010, also independently. He released a fourth studio album, Hotdoggin', on April 26, 2011. His fifth studio album, Writer Dye: Deux or Die, was released on October 22, 2012. A second mixtape, Christopher Collabo with DJ Sean P, was released on January 29, 2013, independently. He released Gold Tips with DJ Sean P, his sixth studio album, on April 8, 2014, through Man Bites Dog Records. A seventh studio album, 1985 Party Time Excellent, was released independently on March 3, 2015. His eighth studio album, We Buy Gold with DJ Sean P, was released on October 16, 2015.

Recently, KRUM explained the recent name change, “I'm making some changes over here so I wanted to let you all know the latest. This will be the last e-mail that you get from Playdough. Don't worry, I'm still making music and going strong. From now on all of my music will be under the name ‘Krum’. I know that's a major change, but it's great news and I'm super excited about moving forward. I made a quick video to explain the reason for the change and what the future looks like for me.” 

Bare Knuckle Gospel was his first release under the new name on April 28, 2016. Blue Eyed Devil releases February 3, 2017 as the second release.