McGwire, Mark David definition of McGwire, Mark David in the Free Online Encyclopedia.

McGwire, Mark David (məgwīr`), 1963–, American baseball player, b. Pomona, Calif. A muscular first baseman who was a college and Olympic (1984) star, McGwire broke into the American League as Rookie of the Year in 1987 with the Oakland Athletics, hitting a record 49 home runs for a rookie season. In succeeding years he sometimes struggled for hitting consistency but showed great power, hitting 52 homers in 1996. In 1997 he was traded in midseason to the St. Louis Cardinals of the National League, and he completed his second successive year with 50 or more home runs, a feat achieved previously only by Babe Ruth Ruth, Babe (George Herman Ruth), 1895–1948, American baseball player, considered by many the greatest of all baseball players, b. Baltimore.

Early Life

When he was seven years old his parents placed him in St.
..... Click the link for more information. . In 1998 he and Sammy Sosa Sosa, Sammy (Samuel Kevin Sosa Peralta) (sämwĕl` sō`sä pĕräl`tä), 1968–, Dominican baseball player.
..... Click the link for more information. of the Chicago Cubs mounted an assault on the single-season home-run record (61) held by Roger Maris Maris, Roger Eugene (măr`ĭs), 1934–85, American baseball player, b. Hibbing, Minn.
..... Click the link for more information. . McGwire hit two in the year's final game to end with 70; Sosa finished with 66. In 1999 the pair repeated their achievement, McGwire hitting 65 homers, Sosa 63. McGwire's single-season home-run record was broken in 2001 by Barry Bonds Bonds, Barry Lamar, 1964–, American baseball player, b. Riverside, Calif. Bonds grew up surrounded by baseball; his father, Bobby Bonds, was a San Francisco Giants outfielder (1968–74), and the great Willie Mays was his godfather.
..... Click the link for more information. . Plagued by injuries, McGwire retired the same year with 583 lifetime home runs. His achievements have since been tarnished by suspicions that they were accomplished with the aid of anabolic steroids anabolic steroid (ăn'əbŏl`ĭk stĕr`oid, stĭr`–) or androgenic steroid
..... Click the link for more information. .