Britton was drafted by the Baltimore Orioles in the eighth round (233rd overall) of the 2001 MLB draft.[1] He spent time as a starter and reliever but was pitching exclusively out of the bullpen by 2005.[2] That year he was a Mid-Season All-Star[3] with the Frederick Keys of the Carolina League and finished the season with a 1.60 ERA and 110 strikeouts in 78.2 innings. His performance earned him Relief Pitcher of the Year as part of the inaugural This Year in Minor League Baseball Awards.[4]
Britton started the 2006 season in Double-A with the Bowie Baysox but was promoted directly to the major league club on April 12.[5] As a rookie with the Orioles, Britton made 52 relief appearances, and was 0–2 with a 3.35 ERA while allowing 46 hits and recording 41 strikeouts and 17 walks in 53.2 innings pitched.[6]
New York Yankees
On November 12, 2006, the Orioles traded Britton to the New York Yankees for right-handed pitcher Jaret Wright and $4 million.[7] He started the season at Triple-A Scranton/Wilkes-Barre but was called up on April 15, 2007, after a string of injuries to starting pitching and a pair of extra inning games.[8] He made his first appearance with the Yankees two days later, on April 17, pitching a scoreless ninth inning.[9] Britton was called up again on June 2.[10] He was recalled on August 29, 2007, with Sean Henn getting sent down to Triple-A.[11]
In 2008, Britton was first recalled on May 1.[12] He spent the season bouncing between Triple-A and the majors. On June 6, 2008, Britton was placed on the disabled list with a rib cage injury.[13]
Following the 2008 season, Britton was non-tendered by the Yankees, making him a free agent.[14]
San Diego Padres
On December 19, 2008, the Padres announced the signing of Britton to a minor league deal.[15][16] He was released on May 26 after allowing 24 runs on 39 hits in just 20.2 innings between Double-A and Triple-A.[17]