2nd Heinie Manush’s disagreements with Detroit manager George Moriarty land him on the trading block. Manush, along with 1B Lu Blue, are traded to the St. Louis Browns for Chick Galloway, Elam Vangilder, and Harry Rice.
4th Pirates OF Paul Waner noses out Frank Frisch for NL MVP honors with 72 points to 66. Rogers Hornsby, Cubs P Charlie Root, and Giants SS Travis Jackson also score high.
5th The National Board of Arbitration rules the Texas League cannot place teams in Tulsa and Oklahoma City without permission of the Western League, which now operates in those cities. This landmark decision establishes league property rights in the cities of each circuit.
In an attempt to combat “chain store” baseball, the American Association votes to bar further ownership of its clubs by the ML clubs.
7th At the annual PCL meeting, owners vote to split the season into two halves for the 1928 season. The vote is 6-2 to return to the format used in the 1904-05 seasons.
10th Roger Peckinpaugh begins a 6-year term as Indians manager.
11th The Browns sell George Sisler to Washington for $25,000.
12th The NL reports more than 5 million attendance for the league in 1927, a new high. Veteran umpire Hank O’Day is named “player and umpire scout” for the league.
13th Senators president Clark Griffith gains approval to have Washington open the AL season one day before the rest of the league, to celebrate a “National Day” with the U.S. president throwing out the first ball. The AL also installs Ernest S. Barnard as its president.
The Cards trade P Jimmy Ring to the Phils with C Johnny Schulte for C Bubber Jonnard, SS Jimmy Cooney, and OF Johnny Mokan.
15th The Browns continue dealing by selling HR-hitting Ken Williams to the Red Sox. At 38, Williams is still a .300 hitter, but his HR production will drop to 8.
In a joint meeting, the major leagues turn over $5,000 to the Association of Professional Ball Players to aid ill or disabled former players.