4th Elmer Flick of the Phils has 2 homers and a double to pace Philadelphia to a 12–4 win over Boston. Flick will hit .367 this year, not good enough for the batting title. He’ll win it in 1905 with a .306 average, the lowest average to lead a league until Yaz in 1968.
5th Chicago’s Jimmy Ryan leads off against Cincinnati Reds pitcher Noodle Hahn by lining a home run, the 20th time he he’s hit a leadoff round tripper. The Colts win, 4–3.
6th The Detroit Tigers play their first Sunday home game at a new park just beyond the city limits. They will use this park for Sunday games for 3 years.
8th John McGraw and Wilbert Robinson end their holdout and sign with the Cardinals. Both contracts have the reserve clause crossed out, freeing McGraw to return to Baltimore in the AL in 1901.
11th At Cincinnati, the Reds and Phils total 35 hits and 14 errors in a 20–11 Phils win. The New York Times calls it “an old-fashion game, in which runs, hits, and errors are plentiful.”
16th Detroit’s Ducky Holmes and Chicago White Sox Dick Padden get into a fistfight on the field. and Padden is struck with a bat wielded by a Detroit player. Chicago wins, 7-4.
20th Fire breaks out at the Pittsburgh park for the 3rd time in 2 weeks. Police speculate the arsonist is a disgruntled stockholder left out of the new Dreyfuss regime.
Detroit manager Hugh Duffy is suspended for 10 days by the AL for abusing umpire Joe Cantillon.
26th At Chicago, the Colts beat the Superbas 1–0 in 1 hour, 35 minutes. Nixey Callahan tops Frank Kitson.
28th A fire in Cincinnati nearly destroys the grandstand. The new grandstand will not be built until 1902, and the Reds are forced to play on the road for a month.
New York pitcher Cy Seymour, a former 20-game winner, combines with Ed Doheny to walk 9 Pirates and plunk 4 in a 14–0 loss to Pittsburgh. Seymour hits Wagner with a pitch today and plunked him two days ago as well.
29th The Brooklyn team is notified by a Brooklyn building inspector that the center field bleachers at Washington Park are unsafe. They are removed.
30th After beating Chicago, 5–2 and 13–3, in a Memorial Day doubleheader, the Phillies record is 21–10, giving them a 3 ½ game lead over Brooklyn and St. Louis.
31st The Phillies’ Nap Lajoie suffers a broken thumb in a fistfight with teammate Elmer Flick. Nap is sidelined and suspended without pay for 5 weeks. The Phils beat the Chicago Colts, 3–0, but will go 12-17 in Nap’s absence.
In the Detroit-Baltimore game, Detroit’s Ducky Holmes hits a homer to tie the game in the 9th. But Baltimore is so furious at the call that they cause enough ruckus to get the game forfeited to Detroit.