Ogando, 31, pitched exclusively in relief in 2014, appearing in 27 games for the Texas Rangers, but missed most of the last four months of the season on the disabled list due to right elbow inflammation. He was placed on the 15-day DL on June 4, was transferred to the 60-day DL on August 3, and did not return to the active roster. A native of the Dominican Republic, he began the year with a 2-3 record, one save, a 6.84 ERA (19 ER/25.0 IP), and 22 strikeouts for Texas before landing on the DL.
The right-hander debuted in the majors with 44 relief appearances for Texas in 2010 and posted a 1.30 ERA, best among American League relievers with at least 40.0 innings pitched. He was named to the AL All-Star Team in 2011, when he went 13-8 with a 3.51 ERA in his first season as a starter. In his big league career, he has a 3.25 ERA with 132 strikeouts in 138.1 innings out of the bullpen, and is 19-12 with a 3.40 ERA in 48 starts.
Over 183 career appearances spanning five major league seasons from 2010-14, all with the Rangers, Ogando is 28-16 with four saves, a 3.35 ERA (151 ER/406.0 IP), and 325 strikeouts compared to only 132 walks allowed. He has allowed opponents to hit just .231 in his career, 10th lowest among all pitchers with at least 400 innings since the start of 2010. His .220 opponent average against right-handed batters also ranks 10th in the majors in that time (min. 750 batters faced).
Ogando is 2-0 with a 2.37 ERA (5 ER) and 23 strikeouts in 19.0 career postseason innings. All 18 of his postseason appearances came in relief from 2010-11, when the Rangers made back-to-back trips to the World Series.
Originally an outfielder signed by the Oakland Athletics as an international free agent in 2002, he was acquired by Texas in the minor league portion of the 2005 Rule 5 Draft and converted to pitching.
Britton, 25, appeared in seven games over two stints with the Red Sox last season, his first full season as a reliever, and allowed no runs in 6.2 innings. He spent the majority of 2014 with Triple-A Pawtucket, going 2-3 with five saves, a 5.86 ERA (38 ER/58.1 IP) and 37 strikeouts in 45 relief appearances. Signed by the Red Sox as a 23rd-round selection in the 2007 June Draft, the native of Waco, TX made his big league debut with 18 games for Boston in 2013 and is 1-1 with a 2.93 ERA (9 ER/27.2 IP) and 21 strikeouts in 25 career major league outings, all in relief. In 151 career minor league games (102 starts), he owns a 20-40 record with five saves, a 4.63 ERA (262 ER/509.1 IP), and 452 strikeouts compared to 233 walks.