George Herman Ruth, Jr. (February 6, 1895 – August 16, 1948), best known as "Babe" Ruth and nicknamed "the Bambino" and "the Sultan of Swat", was an American baseball player who spent 22 seasons in Major League Baseball (MLB) playing for three teams (1914–1935). Known for his hitting brilliance, Ruth set career records for home runs (714), slugging percentage (.690), runs batted in (RBI) (2,217), and on-base plus slugging (OPS) (1.164). Ruth originally entered the major leagues with the Boston Red Sox as a starting pitcher, but after he was sold to the New York Yankees in 1919, he converted to a full time right fielder. He subsequently became one of the league's most prolific hitters and with his home run hitting prowess, he helped the Yankees win seven pennants and four World Series titles. Ruth retired in 1935 after a short stint with the Boston Braves, and the following year, he became one of the first five players to be elected into the National Baseball Hall of Fame.

Ruth was the first player to hit 60 home runs in one season (1927), a mark first eclipsed by Roger Maris in 1961 with 61. Ruth's lifetime record of 714 home runs stood until 1974 when it was surpassed by Hank Aaron. Unlike many power hitters, Ruth also hit for a high batting average: his .342 lifetime average is the tenth highest in baseball history, and in one season (1923) he batted .393, a Yankee record. Ruth dominated the era in which he played. He led the league in home runs during a season twelve times, slugging percentage and OPS thirteen times each, runs scored eight times, and RBIs six times. Each of those totals represents a modern record.

Mark David McGwire (born October 1, 1963), nicknamed "Big Mac", is an American former professional baseball player who played his major league career with the Oakland Athletics and the St. Louis Cardinals. He is currently the hitting coach for the St. Louis Cardinals.

For his career, McGwire averaged a home run once every 10.61 at bats, the lowest at bats per home run ratio in baseball history (Babe Ruth is second at 11.76). In 1987, he broke the single-season home run record for rookies, with 49. In 1998, McGwire and Sammy Sosa achieved national fame for their home run-hitting prowess in pursuit of Roger Maris' single season home run record; McGwire broke the record and hit 70 home runs that year.Barry Bonds now holds the record, after hitting 73 home runs during the 2001 season.

After three years at Southern California and a stint on the 1984 U.S. Olympic team, McGwire was drafted 10th overall by the Oakland Athletics in the 1984 Major League Baseball Draft.

McGwire made the major leagues in August. As a rookie in 1987 he hit 33 homers before the All-Star break and was a unanimous choice for AL Rookie of the Year after finishing with 49 homers, 118 RBI and a .289 average. His 49 longballs smashed the old rookie record of 38, jointly held by Frank Robinson and Wally Berger. He sat out the season's final two games and gave up a chance at 50 home runs to be present at the birth of his first child.