The Red Sox will have to wait a day for a chance to catch up on the AL East-leading Tampa Bay Rays.
The series opener Friday was postponed because of rain and rescheduled as part of a day-night doubleheader on June 8.
World Series champion Boston has won five of seven and trails Tampa Bay by 5½ games. The Rays won 11 of their first 14 but have lost six of their last 11, getting swept at home by the Red Sox in a three-game series last weekend.
Right-hander Josh Smith was scheduled to start Friday in his Red Sox debut, with Charlie Morton (2-0) was slated for Tampa Bay. The 31-year-old Smith, last in the major leagues with Oakland in 2017, was selected from Triple-A Pawtucket on Friday and right-hander reliever Travis Lakins was optioned to the International League team.
Boston left-hander David Price (1-1) and Tampa Bay right-hander Tyler Glasnow (4-0) were to start Saturday.