ATP International Series | World Series | World Series of Poker | Super Bowl | ATP International Series Gold | Star Trek: The Original Series | ATP World Tour 250 series | Buffy the Vampire Slayer (TV series) | series | ATP World Tour 250 Series | Super Nintendo Entertainment System | Gossip Girl (TV series) | Casualty (TV series) | House (TV series) | The Twilight Zone (1959 TV series) | One Tree Hill (TV series) | limited series | Lost (TV series) | NCIS (TV series) | Super League | 90210 (TV series) | The Outer Limits (1963 TV series) | Sprint Cup Series | Monk (TV series) | Angel (TV series) | The Avengers (TV series) | Top Gear (2002 TV series) | Heartbeat (UK TV series) | ATP World Tour 500 series | Six Feet Under (TV series) |
Since that time Karl has traveled the world competing in over 70 top national and international contests including the prestigious World's Strongest Man contest, the IFSA Strongman World Championships, the Arnold Strongman Classic and the Strongman Super Series.
On July 4, 2009 Marshall recorded his biggest win to date, a victory at the Strongman Super Series Bucharest contest, defeating Nick Best, Brian Shaw and Johannes Arsjo.