June 29, 2004: Randy Johnson strikes out Jeff Cirillo of the San Diego Padres to earn his 4,000th career strikeout.
Standing at 6 feet and 10 inches, Johnson had one of the most dominant fastballs in the game.
Johnson played for six different teams during his career (1988-2009). He spent the bulk of his time in the majors with the Seattle Mariners (1989-1998), and the Arizona Diamondbacks (1999-2004).
Throughout Johnson's illustrious career he won five Cy Young awards (four consecutively), made 10 All-Star Games, and won the World Series in 2001.
The Big Unit racked up 4,875 strikeouts during his time in league, which is second most all time behind Nolan Ryan.
Johnson was inducted to the Hall of Fame in 2015, his first year of eligibility.