the 1966 cleveland indians season was a season in american baseball. the team finished fifth in the american league with a record of 81–81, 17 games behind the baltimore orioles. the 1966 season started off hopeful for the cleveland indians as they won their first ten games, and held a 27-10 record in late may. they would hold first place as late as june 12 but were out of first place after that and never returned to the top. a struggle in run production brought the indians back to the .500 mark, as a seemingly promising season ended up being one of the most disappointing. the indians are the only team to win the regular season series vs the world series winning 1966 baltimore orioles (who would sweep the dodgers, while allowing only 2 runs the entire series).