Angels On August 31, 2017, Phillips was traded to the Los Angeles Angels for cash considerations and Tony Sanchez. In 24 games played with the Angels, Phillips had a slash line of .255/.269/.382 in 102 at bats. Boston Red Sox On June 27, 2018, Phillips signed a minor league contract with the Boston Red Sox, and was assigned to the Triple-A Pawtucket Red Sox. Phillips appeared in 38 games with Pawtucket and six games with the Class A Short Season Lowell Spinners, batting a combined .304 with five home runs and 26 RBIs. Phillips was added to Boston's active roster on September 4. He made his Red Sox debut the following day, hitting a two-run home run in the ninth inning to carry the Red Sox to a 9–8 victory over the Atlanta Braves, completing a comeback from Atlanta's 7–1 and 8–7 leads late in the game. Phillips was the first player in Red Sox history to wear uniform number 0. Overall with the 2018 Red Sox, Phillips appeared in nine games, batting 3-for-23 (.130) with one home run and two RBIs. The Red Sox finished the year 108–54, clinching the AL East pennant. Phillips was not included on the team's postseason roster, as the Red Sox went on to win the World Series over the Los Angeles Dodgers. He elected free agency on October 29. Vallejo Admirals On June 25, 2019, Phillips signed with the Vallejo Admirals of the independent Pacific Association. The team was managed by his younger brother P.J. Phillips. Phillips played four games for the Admirals before being granted his release. Diablos Rojos del México On July 15, 2019, Phillips signed with the Diablos Rojos del México of the Mexican League. During the season he played in 36 games. He batted .267/.327/.420 with 35 hits in 131 at bats. He had 3 home runs, 11 doubles and 15 RBIs. Phillips elected free agency on October 5, 2019. Baseball Brilliance In July 2020, Phillips played in 8 games for the Baseball Brilliance of the Yinzer Baseball Confederacy. Phillips had 5 hits in 35 plate appearances for the Brilliance, with a .152/.200/.333 batting line. One of those 5 hits included a July 11 home run against the Steel City Slammin' Sammies at Washington Wild Things Park. Lexington Legends On August 19, 2020, Phillips joined the Lexington Legends in their Battle of the Bourbon Trail series. On August 22,