Tallest NBA Player
Romanian-born Gheorghe Muresan of the Washington Bullets, who made his professional debut in 1994, is 2.31-m (7-ft 7-in) tall. Muresan didn't take up basketball until he was 14, but he was playing for the Romanian national team by the age of 16. His career in the USA has been hampered by injury.
With about five seconds of google.com.au I came up with the answer.
Geez I wouldn't have guessed, guinnessworldrecords.com
Do you not google?