[4][5] On November 10, 2014, it was reported that Davis had accepted an invitation to play in the 2015 Senior Bowl as a part of the North team under Tennessee Titans head coach Ken Whisenhunt.

[6] Davis improved his draft stock with top performances during practice throughout the week and met with coaches from the Baltimore Ravens.

[7] For his efforts, Davis was voted by a panel of NFL scouts as the Reese's Senior Bowl Practice Player of the Week.

[8] On January 24, 2015, Davis assisted on a tackle for a loss and sacked Colorado State's Garrett Grayson, as he helped the North defeat the South 34-13.

Davis had pre-draft visits and private workouts with six teams, including the Dallas Cowboys, San Francisco 49ers, Buffalo Bills, Miami Dolphins, Detroit Lions, and Chicago Bears.

[10] On March 23, 2015, Davis participated at Iowa's pro day, along with Brandon Scherff, Andrew Donnal, Louis Trinca-Pasat, John Lowdermilk, Damond Powell, Mark Weisman, and six others.

Although the Baltimore Ravens did not have a pre-draft visit or private workout with Davis, they did meet with him during the Senior Bowl and NFL Scouting Combine in Indianapolis.

[21] He competed with Brandon Williams and Christo Bilukidi throughout training camp for the vacant starting nose tackle position left by the departure of Haloti Ngata to the Lions during free agency.

[22] Head coach John Harbaugh named Davis the backup starting nose tackle to Williams to begin the regular season.

[23] He made his professional regular season debut in the Ravens' season-opener against the Denver Broncos and recorded three combined tackles and a pass deflection in their 19–13 loss.

On September 27, 2015, Davis earned his first career start at defensive tackle and defended a pass during their 28–24 loss to the Cincinnati Bengals.

[26] Davis competed with Williams, Willie Henry, Michael Pierce, and Trevon Coley throughout training camp for the starting nose tackle position.

[27][28] On September 1, 2016, Davis sustained an ankle injury and left during the Ravens' 23–14 victory over the New Orleans Saints in their pre-season finale.

[30] Davis returned to training camp in 2017 and competed with Brent Urban, Williams, and Bronson Kaufusi for the starting defensive end position.

[50] He was designated to return from injured reserve on December 17, and began practicing with the team again,[51] but was not activated before the end of the regular season.

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