1998 Major League Baseball home run record chase
During Major League Baseball's (MLB) 1998 season, Mark McGwire of the St. Louis Cardinals and Sammy Sosa of the Chicago Cubs pursued the league's long-standing and highly coveted single-season home run record (61), set in 1961 by Roger Maris.
Source: Wikipedia — 1998 Major League Baseball home run record chase (CC BY-SA 4.0)