Maureen Connolly of USA won all the 4 Grand Slams in a year in 1953.
steffi graf won that in 1988 ...all four major slams plus olympic gold...
Through the 2013 season, there were 6452 grand slams hit in baseball history. The most grand slams in a season happened in the year 2000 when 176 grand slams were hit.
2 grand slams (as on 5 July 2010)
There are four Grand Slams each year. The Australian Open, Roland Garros (French Open), Wimbledon and the US Open.
Australia hosts the australian open. It is one of the four grand slams. Australian open is the firs grand slam of the year.
nohe has won all four but not in a calendar year
4 grand slams
Tennis Bon Budge (1938), Rod Laver (1962, 1969)
That was 1988.