Atari David Bigby (born September 19, 1981) is an American football safety for the San Diego Chargers of the National Football League. He was signed by the Miami Dolphins as an undrafted free agent in 2005. He played college football at the Central Florida.

Bigby has also been a member of the New York Jets, the Green Bay Packers and the Seattle Seahawks.

Bigby attended Miami High School in Miami, Florida where he lettered three years in football and two in track. He attended high school with safety Marquand Manuel, Houston Texans wide receiver Andre Johnson, San Diego Chargers wide receiver Roscoe Parrish, Philadelphia Eagles offensive lineman Jamaal Jackson, and Miami Heat forward Udonis Haslem. As a prep player at Miami (Fla.) Senior High School, played every position on the field other than lineman. His senior year, Bigby recorded 72 tackles, four forced fumbles, and one interception, on defense. On offense, he had 500 receiving yards, 315 rushing yards, and nine touchdowns. Bigby earned second-team Class 6A all-state honors and also played in the Dade-Broward All-Star Game. .