Jack Justin Crawford (born 7 September 1988) is an English former professional American football defensive end.

He played college football at Penn State University and was selected by the Oakland Raiders in the fifth round of the 2012 NFL draft.

[1] At the age of seven, Crawford was diagnosed with alopecia universalis, a rare, autoimmune disease causing the total loss of all hair on the body.

Although he intended to pursue basketball, he couldn't play as a sophomore because of an international transfer rule and decided to join the American football team with no previous experience.

As a sophomore, he replaced Aaron Maybin and started all 13 games at defensive end, ranking ninth in the Big Ten Conference in tackles for loss (15) and tenth in sacks (5.5).

[5] As a senior, he started all 13 games, posting 42 tackles (7.5 for loss), 6.5 sacks, 6 passes defensed[clarification needed] and 2 fumble recoveries.

On September 2, 2014, Crawford was signed as a free agent by the Dallas Cowboys, who had scouted him during joint training camp practices with the Oakland Raiders.

He missed 3 games with a calf injury before returning to play in London against the Jacksonville Jaguars, tallying two tackles, one sack, one quarterback pressure and forced a fumble.

He appeared in 6 games as a reserve player, making 7 tackles (one for loss), 2 sacks, 2 quarterback pressures and one forced fumble.

He appeared in all 16 games with a career-high 11 starts, while finishing the season with 35 tackles (7 for loss), six sacks, 9 quarterback hurries, one pass defensed, one forced fumble, and one interception.