The AP reports:

The Boston Celtics’ series-clinching victory over the Cleveland Cavaliers in Game 6 of the Eastern Conference semifinals is the second-most watched basketball game ever aired on ESPN.

The broadcast Thursday night drew a 6.6 rating on the cable network and averaged 6,552,000 households and 8,983,000 viewers. Only Game 4 of last year’s Western Conference finals between the Los Angeles Lakers and Denver Nuggets did better on ESPN, earning a 6.9 rating.

InsideHoops.com Says: It was the biggest game of the entire year, in both the regular season and playoffs.