Getty The Red Sox face a roster crunch concerning Tommy Kahnle, who has a June 1 opt-out date. The Boston Red Sox signed right-hander Tommy Kahnle to a minor league deal. The deal includes a June 1 opt-out date, which Kahnle intends to trigger, reports MassLive’s Chris Cotillo . “I know there are dates coming up,” interim manager Chad Tracy told Cotillo. “Our front office, they’re always aware of that. We’re well-aware of who he is, what he’s done and his performance down there.” With a looming