Liam McHugh was born on April 27, 1977, in Williston Park, Long Island, New York, to Frank McHugh, a high school track coach, and a mother who worked as a library clerk. He pursued sports writing at Herricks High School before attending the University at Buffalo, where he played soccer and wrote for the campus newspaper The Spectrum. He later earned a master’s degree in broadcast journalism from Syracuse University.

McHugh began his print career at Newsday before transitioning to television in 2004 at WTHI in Terre Haute, Indiana. He went on to anchor sports at KOKH in Oklahoma City before joining Versus Network in 2010 as host of The Daily Line. He later hosted NHL Live and the 2012 Stanley Cup Final for what became NBC Sports Network.

McHugh expanded steadily at NBC, hosting the Tour de France, Premier League studio coverage, Notre Dame football, and four Olympic Games. He joined TNT Sports in 2021 as a studio host for NHL on TNT. In 2023, he helped launch ML Season Pass on Apple TV+ and served as the inaugural host of the MLS 360 whip-around show.