Most strikeouts in a Major League Baseball season
- Who
- Lynn Nolan Ryan, Matthew Aloysius Kilroy
- Where
- United States
- When
- 01 January 0001
Nolan Ryan (California, American League) pitched 383 in one season in 1973. Matthew Aloysius Kilroy (Baltimore, AA) pitched 513 strikeouts in one season in 1886.