Before the injury, Rodriguez was displaying the best consistency of his career, going 4-2 with a 3.54 in 10 starts.
Because of a doubleheader in the third day back after the All-Star break, the Red Sox will go with a six-man rotation coming out of the break.
Once they go back to a five-man rotation, Rodriguez will likely take the spot of Doug Fister, who could slide to the bullpen.
Ian Browne has covered the Red Sox for MLB.com since 2002. Follow him on Twitter @IanMBrowne and Facebook. This story was not subject to the approval of Major League Baseball or its clubs.