He reached the major leagues in 1981 as a shortstop but moved to third base in 1982,^[2] but the following year, he was shifted to shortstop, his long-time position for Baltimore. That year, Ripken also won the AL Rookie of the Year Award and began his consecutive games played streak. In 1983, he won a World Series championship and his first AL MVP Award. One of Ripken's best years came in 1991 when he was named an All-Star, won the Home Run Derby, and was recipient of his first All-Star Game MVP Award, his second AL MVP Award, and first Gold Glove Award. He broke the consecutive games played record on September 6, 1995, in his 2,131st consecutive game, which fans voted as the league's "most memorable moment" in the history of the game in an MLB.com poll; Ripken voluntarily ended his 17-year streak at 2,632 games before the final home game of the 1998 season. He switched back to third base for the final five years of his career. In 2001, his final season, Ripken was named the All-Star Game MVP and was honored with the Commissioner's Historic Achievement Award.

Ripken is considered one of the best shortstops in baseball history. At 6 ft 4 in (1.93 m), 225 lb (102 kg), he pioneered the way for the success of taller, larger shortstops. He holds the record for most home runs hit as a shortstop (345), breaking the record previously held by Ernie Banks, and was selected as the starting shortstop for the Major League Baseball All-Century Team. Ripken is a best-selling author and the President and CEO of Ripken Baseball, Inc., whose goal is to grow the love of baseball from a grassroots level. Since his retirement, he has purchased three minor league baseball teams. He has been active in charity work throughout his career and is still considered an ambassador of the game.