The United States Supreme Court finds that baseball is primarily a sport and not a business in its ruling on the Federal Baseball Club v. National League case. In using this argument, the court rules that baseball is not subject to antitrust laws nor to standard interstate commerce regulations.

Against Philadelphia‚ the Yankees plate 7 runs in the 7th to beat the Athletics‚ 7 – 4. Carl Mays is the winner‚ notching his 20th straight victory over the A’s.

In the 9th inning at Ebbets Field, pinch-hitter Clarence Mitchell, batting for starter Leon Cadore, hits a two-run homer, but the Dodgers come up short, losing to Boston, 5 – 4. Mitchell’s blast is the first pinch homer by a Dodgers pitcher.

George Sisler and Frank Baker match homers as the Browns and Yankees go into the 7th tied, 3 – 3. Ken Williams hits his 12th home run of the year‚ with 2 on‚ giving St. Louis a 6 – 3 lead‚ and the Browns add 5 more off reliever Lefty O’Doul to win‚ 11 – 3. Urban Shocker is the winner.

The Yankees, who have been sharing the Polo Grounds with the Giants since 1913, begin construction on their own stadium in the Bronx.

In a 4 – 1 win at New York, Ty Cobb beats out a grounder to SS Everett Scott. Veteran writer Fred Lieb scores it a hit in the boxscore he files with the Associated Press. But official scorer John Kieran of the New York Tribune gives an error to Scott. At the season’s end, the American League official records, based on AP box scores, list Cobb at .401. New York writers complain unsuccessfully, claiming it should be .399, based on the official scorer’s stats. Lieb will reverse himself at the end of the year, but Ban Johnson goes with the hit call.

Hasty makes wasty as Cleveland hits a major league record-tying four triples in the 5th off the A’s Bob Hasty and roll over Philadelphia, 14 – 4. George Uhle is the winner.

Sam Breadon buys a controlling interest of 72% in the St. Louis Cardinals. He and Branch Rickey, who owns the rest of the stock, will combine to create one of baseball’s most successful operations. Breadon demotes Rickey to vice-president, but allows him to remain as field manager.