Due to lack of record-keeping for Negro league baseball games, the exact number of no-hitters thrown is unknown.
However, ongoing research by baseball historians has revealed that at least 34 no-hitters were thrown in the Negro leagues.
Researchers have had to clarify differences between play from teams and barnstorming, and one of the no-hitters was thrown at a benefit All-Star Game.
[2] Of the 25 no-hitters, four pitchers threw two: Phil Cockrell, Nip Winters, Satchel Paige, and Porter Moss.
Leon Day threw a no-hitter on May 5, 1946, to open the season for the Newark Eagles against the Philadelphia Stars, which would be considered the second no-hitter thrown by on Opening Day after Bob Feller did so on April 16, 1940, against the Chicago White Sox.