Yesterday’s edge-of-your-seat Celtics game drew more than twice as many TV viewers than the Red Sox. The Celtics vs. Cavaliers game on WCVB-TV (Ch.5) had 633,000 total viewers. Over at NESN, the Sox vs. Brewers had 289,000 viewers. In the 25 to 54-year-old demo, the Celtics drew 320,000 viewers...