Phillips will start Tuesday's game against the Red Sox, Daniel Alvarez-Montes of ElExtraBase.com reports.
Phillips was deployed as a reliever in his last appearance against the Phillies, but he'll work as a starter Tuesday as the Marlins look to bounce back from a loss in the series opener. The 28-year-old has been a solid option for the Marlins over his last eight outings, posting a 3.98 ERA and 1.36 WHIP with a 27:10 K:BB across 31.2 frames.