Milwaukee right-hander Corbin Burnes has made four starts this season, striking out 40 batters while walking none.
Since 1893, when the pitching rubber was set at 60 feet, 6 inches, no starting pitcher has begun a season with 40+ strikeouts before issuing a walk.
Burnes is the first pitcher in the modern era (since 1901) to have 40+ strikeouts and 0 walks in any four-game stretch of any season.
Burnes is the first pitcher to have 9+ strikeouts and allow 0 or 1 run in each of his first four appearances in a season.