Most Unearned Runs allowed in a season?

Question

The Rangers have allowed 198 unearned runs this season and I was wondering what the record is for most unearned runs allowed by a team in a single season.

Answer 1

Back in the early days of baseball unearned runs were very common.  The most by a team was:

1890 Players Leage - Cleveland 1027 R, 537 ER, 490 Unearned

1887 American Association : Cleveland 1112 R, 630 ER, 482 Unearned

1890 National League - Pittsburgh 1235 R, 780 ER, 455 Unearned.

Post 1900 the most was:

1903 National League - St. Louis 795 R, 494 ER, 301 Unearned

Most by each decade since 1940:

1945 National League - Philadelphia 865 R, 697 ER, 168 Unearned

1950 American League - St. Louis 916 R, 789 ER, 127 Unearned

1962 National League - New York 948 R, 801 ER, 147 Unearned

1974 National League - Chicago 826 R, 697 ER, 129 Unearned

1987 American League - Cleveland 957 R, 834 ER, 123 Unearned

1996 American League - Boston 921 R, 810 ER, 111 Unearned

2001 American League - Tampa Bay 887 R, 781 ER, 106 Unearned