The Red Sox called up righty Allen Webster from Triple-A Pawtucket on Tuesday, and the 23-year-old is expected to start Wednesday against the Twins. In addition, the team announced that reliever Joel Hanrahan will be placed on the disabled list for the second time this season. In one previous start this season at the major-league level (on April 21) Webster tossed six innings of five-hit baseball in a 5-4 loss to the Royals. Webster is 1-0 with a 2.70 ERA (6 ER/20.0 IP) in four starts for the PawSox this year, compiling 26 strikeouts compared to six walks while holding opponents to a .171 average (12-for-70). For Hanrahan, this marks his second stint on the disabled list this season after missing 15 games last month because of a right hamstring strain. The 31-year-old has made three appearances since coming off the disabled list on April 30, allowing two runs over 2.2 innings of work. He collected his 100th career save with a scoreless ninth inning in Toronto on May 2. Hanrahan is 0-1 with four saves, a 9.82 ERA (8 ER/7.1 IP), and five strikeouts over nine relief outings for the Red Sox overall in 2013, his first season with the club.