The San Francisco Giants had the longest winning streak within the 1966 regular season at 12 straight games. During this streak they beat their opponents by an average of 4.2 runs. The streak started on Apr 30, 1966 and ended on May 13, 1966.
In the 1966 MLB season, there were no winning streaks that were in the all time top 50 winning streaks in the same season.
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