He played college football for the Iowa Hawkeyes and was selected by the Green Bay Packers in the fourth round of the 2012 NFL draft.

[1] He attended Highland Regional High School in Gloucester Township, New Jersey, where he played running back and defensive tackle.

Daniels was also a three-year letterman in wrestling and state qualifier in the discus (43.77m or 143’06) and threw the shot put (17.95m or 58’09) at the New Jersey Meet of Champions.

[5] At the end of the season, he earned a spot on the honorable mention All-Big Ten team by the coaches and media.

[6] During the final season of his college career, Daniels was named to the Pony Express Award preseason watch list.

[1] His performance in his final year earned him a spot on the second-team all-Big Ten team by the coaches and media.

[11] Daniels was selected in the fourth round (132nd overall) of the 2012 draft by the Green Bay Packers who first noticed him a year before when looking at other defensive linemen from Iowa.

During his rookie season in 2012, Daniels played 14 games with 12 tackles, 2 sacks, 1 pass defended, and 2 fumble recoveries.

[16] On December 27, 2015, despite the Packers' bad performance on the offensive line and being blown out 38–8 by the Arizona Cardinals, Daniels snagged his first interception from Carson Palmer.

[18] In Week 1 of the 2017 season, Daniels recorded seven tackles, 1.5 sacks, and a forced fumble off of quarterback Russell Wilson in a 17–9 win over the Seattle Seahawks.

Daniels's forced fumble was vital as it helped set up a Ty Montgomery rushing touchdown.

Having been an alternate three previous occasions in his career, on January 9, 2018, the NFL announced that Daniels would replace Aaron Donald in the 2018 Pro Bowl due to an undisclosed injury.

[19] In 2018, Daniels played in 10 games, recording 18 tackles and two sacks before suffering a foot injury in Week 11.