[3] In 2009, Britton split time between the Gulf Coast League Red Sox and Lowell; he combined to appear in 11.2 innings over seven games.

[2] 2010 saw Britton promoted to the Class A full-season Greenville Drive, where he started 21 games and compiled a 2.97 ERA.

[4] In November 2011, Britton was added to the Red Sox' 40-man roster to prevent other teams from selecting him in the Rule 5 Draft.

[1] On July 31, Britton tossed a pair of shutout innings against the Seattle Mariners to earn his first MLB win.

[3] An injury to his left shoulder caused Britton to spend some of late August and early September on the disabled list.

[1] On December 11, 2015, Britton signed a minor-league contract with the Detroit Tigers, and was invited to spring training.

[3] On August 2, 2016, Britton was suspended 50 games for violating the terms of the Major League Baseball drug policy.

[8] On March 14, 2017, Britton signed with the Bridgeport Bluefish of the Atlantic League of Professional Baseball for the 2017 season.