John Charles Fiala (born November 25, 1973) is an American former professional football linebacker who played from 1998 to 2002 with the Pittsburgh Steelers of the National Football League (NFL). Fiala attended Lake Washington High School in Kirkland, Washington, and then the University of Washington. He was drafted by the Miami Dolphins in the sixth round of the 1997 NFL draft, but did not play for the Dolphins. Fiala signed with the Steelers as a free agent in 1998. From 1999 to 2002, he was a special teams captain for the Steelers. The Steelers released Fiala in 2002; although the Houston Texans offered him a contract for 2003, he chose to retire instead.