Heading into the final weekend of the 1967 Minnesota Twins season, when Rod Carew was named the Major League Baseball Rookie of the Year, the Twins, 1967 Boston Red Sox season, 1967 Chicago White Sox season, and 1967 Detroit Tigers season all had a shot at clinching the American League championship. The Twins and the Red Sox started the weekend tied for 1st place and played against each other in Boston for the final three games of the season. The Red Sox won two out of the three games, seizing their first pennant since 1946 with a 92–70 record. The Twins and Tigers both finished one game back, with 91–71 records, while the White Sox finished three games back, at 89–73. In 1969, the new manager of the Twins, Billy Martin, pushed aggressive base running all-around, and Carew set the all-time Major League record by stealing home seven times in addition to winning the first of seven List of Major League Baseball batting champions. With Killebrew slugging 49 homers and winning the Major League Baseball Most Valuable Player Award, these 1969 Minnesota Twins season won the very first American League Western Division Championship, but they lost three straight games to the 1969 Baltimore Orioles season, winners of 109 games, in the first 1969 American League Championship Series. The Orioles would go on to be upset by the 1969 New York Mets season in the 1969 World Series. Martin was fired after the season, in part due to an August  fight in Detroit with 20-game winner Dave Boswell (baseball) and outfielder Bob Allison, in an alley outside the Lindell A.C. bar. Bill Rigney led the Twins to a repeat division title in 1970 Minnesota Twins season, behind the star pitching of Jim Perry (24-12), the A.L. Cy Young Award winner, while the Orioles again won the Eastern Division Championship behind the star pitching of Jim Palmer. Once again, the Orioles won the 1970 American League Championship Series in a three-game sweep, and this time they would win the 1970 World Series.
Answer this question: Which team lost the 1969 American League Championship series?
Twins