It was once again a slam dunk for the NBA Finals on ABC Tuesday night, but the third game of the Miami/San Antonio championship, like the previous two matchups, produced ratings that were well below those for last year's Finals on the comparable nights. Tuesday night's telecast averaged 11.95 million viewers, peaking in the final half hour with 13.11 million. NBC's America's Got Talent gave the NBA contest a run for its money as it averaged 11.50 million viewers. However, earlier in the evening NBC's The Voice fell to a season low of 10.3 million viewers, down 10 percent from last week.