1st The Reds sell catcher Larry McLean to the Cardinals. McLean threw out 60% of would be base stealers in 1911.
8th Frank Chance inherits Hal Chase and the weakest lineup the New York Yankees will ever have when he signs to manage the team.
10th Sent down to Louisville by the Cubs, Three Finger Brown is bought by Cincinnati. He will be 11–12 with a 2.91 ERA for the 7th-place Reds.
11th With the Phils franchise in disarray following the expulsion of President Horace Fogel, William H. Locke and his cousin William F. Baker buy the club.
22nd The Giants give the Yankees permission to use the Polo Grounds for the 1913 season only, as the lease on the Hilltop grounds has expired. The Yankees will remain as tenants through 1922.
24th In a story in the New York Times, Detroit Tiger President Frank Navin blames the length of the games on the “coachers boxes.” Navin, reacting to AL President Ban Johnsons’s complaint that too many games the previous season had taken two hours to play, says the boxes should be moved back so that the catcher can give the pitcher his signals more quickly. From where they are now, he said, the coaching players can detect the catcher’s signals unless he takes a lot of time to hide them. Navin said this slow signalling is the reason for the longer games (as noted by Lyle Spatz).