Gerrit Cole is already breaking Nolan Ryan and Randy Johnson records in his Astros tenure
Top 5 most unbreakable records in baseball: #3- Nolan Ryan's career strikeouts – FHC Sports Report
Randy Johnson – Society for American Baseball Research
Randy Johnson doesn't think Bumgarner threw no-hitter
Ryan Express kept rolling after elbow injury
SI Vault: Randy Johnson's path to 300 wins and the Hall of Fame - Sports Illustrated
Johnson, Randy Baseball Hall of Fame
Watch How This Expert Helped MLB Pitchers Become the Best (Nolan Ryan, Randy Johnson), The Assist
September 26, 1981 – Nolan Ryan becomes the first pitcher to throw fiv
At 44, Nolan Ryan tosses seventh no-hitter
Randy Johnson went from 'Wild Thing' to 'Big Unit' before Hall of Fame - Los Angeles Times