The host of American Ninja Warrior squared off against 15 other celebrities, all representing their favorite charities while vying for the title of The Celebrity Apprentice. In the end, the new Boss — twice-elected California governor and international movie superstar Arnold Schwarzenegger — selected Iseman to be his Apprentice. Along the way, Iseman impressed world-class business minds including Warren Buffett, former Microsoft CEO and Los Angeles Clippers owner Steve Ballmer, business magnate Tyra Banks, and Honest Company CEO Jessica Alba. Well, he impressed most of them.

Iseman was diagnosed with rheumatoid arthritis in 2002, so this Emmy Award-winning host and licensed MD fights for the charity closest to his heart: the Arthritis Foundation. His ongoing battle with rheumatoid arthritis transformed him into a strong supporter of the Foundation — the very charity he represented while winning Celebrity Apprentice. Yes, Arnold Schwarzenegger considers him a celebrity.

"Life is short, do what makes you happy." That's the advice Matt got from his Dad — a world-renowned physician — when Matt quit medicine to pursue stand-up comedy. And those words still guide him today. He talks ninjas, tells jokes around the world, and in general proves that laughter is the best medicine. Perhaps best known as the host of the Emmy-nominated American Ninja Warrior, the Boston Globe has said: "The best part about American Ninja Warrior, hands down, is when bro-host Matt Iseman roars the show's title."

Dr. Matt checks in every week on Hallmark's Home & Family, sharing his medical expertise and unique lifestyle tips. His hosting has earned him an Emmy Award on Clean House. He also hosted Sports Soup on Versus and Scream Play on E!, starred in countless commercials, numerous sitcoms, and Transformers 2. Matt has headlined clubs all around the country and performed for the troops around the globe — including at one of Saddam Hussein's palaces in Iraq.

Matt pitched for the baseball team all four years at Princeton University, then earned his MD from the Columbia College of Physicians and Surgeons. Yes, he really is a doctor. He now lives in Hollywood and travels from Los Angeles.