Mark McGwire is credited with "saving baseball" after his 1998 battle with Sammy Sosa for the all-time single season homeruns record of 61, set by Roger Maris in 1961. While both players broke the record, McGwire finished with a new record of 70 as Sosa finished with 66. McGwire entered the majors in 1986 with the Oakland Athletics, having an immediate impact with a 1987 AL Rookie of the Year award and all-star selection. McGwire won his only World Series as a player with the A's in 1989. In 1997, he was traded to the St. Louis Cardinals, where he would break the single-season homerun record. After years of accusations, in 2010 McGwire admitted to steroid use throughout his career, claiming they were used to speed up injury recovery. In 2011, he won the World Series as the batting coach for the Cardinals.