Thomas, a five-time Pro Bowler, was one of the top cornerbacks in football during a career with the Kansas City Chiefs that spanned 1966 to 1978. He ranks ninth on the NFL's all-time interceptions list with 58, including a team-record 12 in 1974. He led the NFL with nine interceptions in 1969, and added three more in the playoffs, including one against Minnesota in the Chiefs' victory in Super Bowl IV. He had at least one interception in 12 of his 13 professional seasons.
He was nominated by the Seniors Committee.
Thomas, 64, will be joined at the Aug. 2 induction ceremony by two former Washington Redskins — cornerback Darrell Green and Art Monk — as well as New England linebacker Andre Tippett, San Diego/San Francisco defensive end Fred Dean and Minnesota/Denver offensive tackle Gary Zimmerman.
"No one is happier than I am," said Thomas, who spent several seasons as Green's position coach with the Redskins and finished the 2007 season as the Atlanta Falcons' interim head coach. "I feel very fortunate."
"I know the man, I love the man," Green said.
Thomas was an undrafted free agent out of Bishop College, which closed in 1988.
"When I give my speech, I'll tell everyone about Bishop," Thomas told the Dallas Morning News. "Now it'll be remembered forever. I got a lot of calls when I was first nominated from a lot of guys I played with and a lot of Bishop alumni around the world. Now that it's come to truth that I've gotten into Canton, the college will live in the hearts and minds forever."