He played in Major League Baseball (MLB) for the Atlanta Braves and Kansas City Royals.

[1] He made his professional debut that season with the Gulf Coast League Braves, going 4–2 with a 2.25 earned run average (ERA) in 12 games (nine starts).

He then spent 2002 with Macon and the Rookie-level Danville Braves, and posted a combined 5–4 record and a 3.72 ERA in 16 games (15 starts).

[2] Davies was a member of the Single-A Rome Braves during their inaugural season, when they won the 2003 South Atlantic League championship.

[2] Davies was part of the group of rookie players nicknamed the "Baby Braves" that Atlanta called up from its minor league system during the 2005 season.

[6] When Thomson and Hampton returned to the pitching rotation in August, Davies was sent back to the minor leagues.

However, in 17 starts, Davies had a terrible time establishing any pattern of reliability and consistency, posting a record of 4–8 with a 5.76 ERA.

[11] Consequently, Davies was optioned to Richmond on July 19 as rookie Jo-Jo Reyes assumed his spot in the rotation.

[12] On July 31, 2007, Davies was traded to the Kansas City Royals in exchange for pitcher Octavio Dotel.

[7] After competing for a spot in Kansas City's starting rotation during Spring Training in 2008, Davies was optioned to the Triple-A Omaha Royals on March 26.

[17] In his season debut on May 31, Davies threw five innings, allowing just one run in a 4–2 win over the Cleveland Indians, snapping the Royals' 12-game losing streak.

[25] After missing April and half of May due to shoulder problems, Davies was assigned to the High-A Fort Myers Miracle, where he made his first start on May 15.

On July 23, Davies was promoted to the Double-A New Britain Rock Cats, where he made seven starts to finish the season.

[26] He spent the season in the minor leagues, finishing with an 11–9 record and a 3.91 ERA in 26 starts for the Double-A Akron RubberDucks and Triple-A Columbus Clippers.

After sitting out the 2017 season, Davies signed with the Somerset Patriots of the Atlantic League of Professional Baseball on May 7, 2018.