John Thomas Howell is a former American football safety in the National Football League.
Howell was born in North Platte, Nebraska, and attended Mullen High School in Mullen, Nebraska.
Howell played college football at Colorado State University, and attended the university on a football scholarship.
He played professionally for the Tampa Bay Buccaneers and Seattle Seahawks. He was a letterman in American football, wrestling, track and field, and golf. In football, he was a two-time first team All-Conference honoree, and as a senior, he was an All-State honorable mention selection.
Howell was drafted by the Tampa Bay Buccaneers in the fourth round of the 2001 NFL Draft.
He played four seasons with the Tampa Bay Buccaneers, including Super Bowl XXXVII in 2002. Howell signed with the Seattle Seahawks for the 2006 season.
He suffered a season-ending hamstring injury in the 2006 Seahawks" playoff game against the Dallas Cowboys and was waived shortly thereafter.