I was unbelievably impressed with how well the Sox did in Baltimore. The Orioles, 73-52, are tied with the Yankees for the best record in the American League--as well as tied with the Dodgers for the second best record in MLB and just a tad behind the Phillies @ 73-51. And the Sox split 4 tough games despite going into the series with a pitching staff in disarray and ranked 18th in ERA before the series and 19th afterward.
Three--Pivetta, Bello, and Crawford-- of the starters against Baltimore were adequate or better. Criswell, the nonstarter-starter in game 2, was awful (3.1 IP, 6 ER) in game 2, but got the win because the Sox scored 12 freaking runs. And Houck, starting tonight, has the highest WAR (3.3--2d best is Crawford's 1.6) and most quality starts, 17.
So I would argue the rotation is viable, but the bullpen is not. So I cannot resist pointing out, yet again, that the rotation, which Breslow did his level best to destroy (by dumping Sale and bringing in Giolito), is doing way better than the bullpen, which should have been easier to fix.
FWIW, the three best Sox bullpen WAR's belong to Jansen (1.7), Kelly (1.2), and Booser (1.0), all of whom were Soxers before Breslow arrived.