Steve Dalkowski, American baseball player
Stephen Louis Dalkowski Jr. (June 3, 1939 – April 19, 2020), nicknamed Dalko, was an American left-handed pitcher. He was sometimes called the fastest pitcher in baseball history and had a fastball that probably exceeded 100 mph (160 km/h). Some experts believed it went as fast as 110 mph (180 km/h), others that his pitches traveled at less than that speed. As no radar gun or other device was available at games to measure the speed of his pitches precisely, the actual top speed of his pitches remains unknown. Regardless of its actual speed, his fastball earned him the nickname "White Lightning". Such was his reputation that despite his never reaching the major leagues, and finishing his minor league years in class-B ball, the 1966 Sporting News item about the end of his career was headlined "Living Legend Released."Dalkowski was also famous for his unpredictable performance and inability to control his pitches. His alcoholism and violent behavior off the field caused him problems during his career and after his retirement. After he retired from baseball, he spent many years as an alcoholic, making a meager living as a manual laborer. He recovered in the 1990s, but his alcoholism left him with dementia and he had difficulty remembering his life after the mid-1960s.

Screenwriter and film director Ron Shelton played in the Baltimore Orioles minor league organization soon after Dalkowski. His 1988 film Bull Durham features a character named Ebby Calvin "Nuke" LaLoosh (played by Tim Robbins) who is based loosely on the tales Shelton was told about Dalkowski. Brendan Fraser's character in the film The Scout is loosely based on him. In 1970, Sports Illustrated's Pat Jordan wrote, "Inevitably, the stories outgrew the man, until it was no longer possible to distinguish fact from fiction. But, no matter how embellished, one fact always remained: Dalkowski struck out more batters and walked more batters per nine-inning game than any professional pitcher in baseball history."