BOSTON — Knuckleball pitchers don’t come around very often, but there’s a good reason the Red Sox have had two pretty notable ones on the mound. Wednesday’s 9-4 win over the Atlanta Braves marked knuckleballer Steven Wright’s fourth straight quality start this season after an outing that saw him allow two runs (one earned) on just three hits with eight strikeouts and three walks over seven innings. Wright has even allowed two runs or fewer in eight straight starts dating back to July, 25, 2015, which is the longest active streak among American League starters. But not every team wants to give knuckleballers a chance, and not every pi...