Johannsen is a favorite of David Letterman and on May 20, 2011 made his 40th appearance on the Late Show with David Letterman.
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According to Jerry Seinfeld, Johansenn was originally wanted for the role of George Costanza in Seinfeld, but he refused the part.
Less Than Jake | Jake Gyllenhaal | Jake Garn | Jake | Jake Roberts | Jake Nava | Jake LaMotta | Jake and Dinos Chapman | Jake Drake-Brockman | The Judge and Jake Wyler | Jake Kaufman | Jake Ballard | Wilhelm Johannsen | Jake Wood | Jake Shears | Jake Richardson | Jake Pavelka | Jake Heggie | Jake Gibbs | Jake 2.0 | Jake Winebaum | Jake Owen | J.J. "Jake" Pickle | Jake Weber | Jake Thomas | Jake T. Forbes | Jake Seamer | Jake Rademacher | Jake Plummer | Jake O'Donnell |
He also got involved in competitions, including the San Francisco International Comedy Competition in 1986 where he placed 3rd behind Jake Johannsen and Eddy Strange.