Enough of it&#x27;s luck that it&#x27;s unlikely that a team would go undefeated for half of a season, but it&#x27;s also the fact that it&#x27;s hard to get a team with only the best players; most teams have a mixture of player ability.  If you put the best major league team in the minor leagues they&#x27;d probably have a 90%+ winning percentage.  (Highest MLB season winning percentage is 76%, longest winning streak is 26 games out of 162, including a tie.)