Boosting its distribution base through a free preview, MLB Network will also see its advertising roster expand during the postseason. Working with affiliates on the free preview, or “freeview,” MLB Network has elevated its subscriber base from some 62 million to north of 90 million as the service connects with coverage on a pair of American League Division Series contests: The opener between Houston and Boston today at 4 p.m. ET and the second game of the Cleveland-New York Yankees series Friday at 5 p.m. ET. The freeview finds distributors including Comcast (Xfinity), Cox, Dish, Altice USA (Optimum), RCN, Verizon FiOS and AT&T’s U-verse and DirecTV opening up their networks to a wider swatch of their customers.