Sox's 4-homer rally falls short in Baltimore

Swihart, Betts go back-to-back BALTIMORE -- One of the more overlooked benefits of the Red Sox's historic first 103 games of the season has been the flexibility in toying around with the weak spots.

Weak spots such as the starting rotation, which has seen multiple members shelved with injury but saw Drew Pomeranz return Tuesday night, and the bullpen, which let a 7-6 loss to the Orioles slip from Boston's grasp -- while the Yankees simultaneously fortified their own relief corps with the reported addition of Zach Britton.

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Pomeranz didn't give the first area of concern a reassuring outing, as he was tagged for four runs in 4 2/3 innings in his first start since May 31.…