Meh. Agree they are far from perfect, but they've carried a heavy load since Kluber, Sale, Houck, Whitlock, and Pivetta dropped out of the rotation. Pivetta is back in the rotation and before that he came in early after a reliever pitched the first inning or two, but his IP's over his last 20 games have been 5, 4, 7.1, 5, 1, 6, 5, 4, 3.1, 0.1, 3, 0.2, 1, 0.2, 0.2, 1, 1, 3, 3, and 2.1.
Or put it this way. Bello leads the Sox in innings pitched with 108.2, which puts him tied for 74th place in MLB.
Given the above--a decimated rotation--I think Cora has done a good job of not over using his best relievers (which has now and then caused consternation on talksox).
In addition to Martin (WAR 2.2), I kind of like Winckowski (1.4), Bernardino (1.4), Jansen (1.1), and Schreiber (.6). Due back this weekend is Whitlock (.3) and soon thereafter Houck (.8), both of whom seem headed to the bullpen because Sale is due back tomorrow to fill the 5th starter slot. Throw in Murphy (.6) and that's a pretty decent bullpen and rotation (Bello 3.2, Crawford 1.9, Paxton 1.9, Pivetta 1.6, and Sale 1.0).