[1][2] The San Diego Padres selected Davis in the 13th round of the 2008 Major League Baseball draft.

On March 28, 2011, the Padres traded Davis and cash considerations to the Washington Nationals in exchange for Alberto González.

Davis was optioned back to Syracuse on July 1 when Bryce Harper was activated from the disabled list.

[9] In 2017, he made 53 appearances for the Triple–A Reno Aces, posting an 8–2 record and 4.38 ERA with 72 strikeouts and 3 saves in 63+2⁄3 innings pitched.

[11] In 49 relief outings for the Triple–A Colorado Springs Sky Sox, he posted a 4–6 record and 3.99 ERA with 56 strikeouts across 65+1⁄3 innings pitched.