There have been three different official most valuable player awards in Major League Baseball history, since 1911; the Chalmers Award (1911-1914), the League Award (1922-1929), and the Major League Baseball Most Valuable Player Award (MVP).
The MVP was first awarded in 1931, and its full title was the Baseball Writers Most Valuable Player Award, or the M.V.P. by the rest of us, and it is presented annually by the Baseball Writers Association of America.
It is considered by Major League Baseball as the only official Most Valuable Player Award and symbolizes the pinnacle of a player's personal achievement during any single season of play. The winners receive the Kenesaw Mountain Landis Baseball Memorial Award, named in honor of the first Commissioner of Major League Baseball.
"Those MVP's are really eating you up, aren't they?" - Robin Yount in a Miller Lite Commercial, "Yea, they are." - 1980 MVP Recipient & Hall of Famer George Brett
BBWAA American League Most Valuable Player Award
BBWAA National League Most Valuable Player Award
Did you know that Hank Greenberg (first base in 1935, outfield in 1940), Stan Musial (outfield in 1943, first base in 1946, outfield in 1948), Robin Yount (shortstop in 1982, outfield in 1989), and Alex Rodriguez (shortstop in 2003, third base in 2005, third base in 2007) are the only players to win a Most Valuable Player Award at more than one position?
Frank Robinson was the first, and still the only, player to win a Most Valuable Player Award from both the American and National League.