Randall David Johnson (born September 10, 1963), nicknamed "The Big Unit", is a former left-handed Major League Baseball starting pitcher. Over a 22-year career, Johnson played for six different teams.

The convert6ft11inmadj=on Johnson was celebrated for having one of the most dominant fastballs in the game. He regularly approached, and occasionally exceeded, convert100mi/hkm/h during his prime. He also threw a hard, biting slider. Johnson won the Cy Young Award five times, second only to Roger Clemens seven.

Johnson finished his career first in strikeouts per nine innings pitched among starting pitchers (10.67), second all-time in total strikeouts (4,875; first among left-handed pitchers), third in hit batsmen (hit by pitch) (188), tenth in hits allowed per nine innings pitched (7.24), 22nd in wins (303), and 57th in shutouts (37). He pitched one of the 20 perfect games in Major League Baseball history.