David Garfield Thomas (born August 25, 1968) is an American former professional football cornerback in the National Football League (NFL) for the Dallas Cowboys, Jacksonville Jaguars, and New York Giants. He was selected in the eighth round of the 1993 NFL draft. He played college football at the University of Tennessee.

Thomas attended Miami Beach Senior High School, where he received third-team All-American and All-Conference honors in football as a senior. He also lettered in basketball and track.

He enrolled at Butler Community College, where he registered 7 interceptions as a freshman and 10 (second in the nation) as a sophomore, on his way to becoming one of the top cornerbacks in junior college.

As a junior in 1990, he transferred to the University of Tennessee. He appeared in all 13 games as a backup cornerback, posting 17 tackles, one interception (returned for 51 yards against UTEP) and one pass defensed.

As a senior in 1991, he was redshirted. In October, an off-field incident caused him to lose his final year of sports eligibility at Tennessee. In 1992, he didn't play football but still stay at the school and graduate.

Even though he was out of football for two years, the Dallas Cowboys selected him in the eighth round (203rd overall) of the 1993 NFL draft. During his time with the team he was one of the tallest cornerbacks in the NFL and showed promise playing special teams and in some of the nickel packages. He was a part of the Super Bowl XXVIII winning team. He appeared in 12 games and finished with 8 special teams tackles.

In 1994, he appeared in all 16 games as a backup cornerback. He collected 4 defensive tackles and 20 special teams tackles (fourth on the team).

The Jacksonville Jaguars selected him from the Cowboys roster in the 1995 NFL expansion draft. He was the team's nickel cornerback and played in 16 games with 2 starts. He tallied 39 tackles, 8 passes defensed, one fumble recovery, one blocked punt and 12 special teams tackles (second on the team)