Question: What is the name of the retired American basketball player born in 1969, who had sold to him by Michael Heisley a 70% controlling stake in the Grizzlies?
Sentence (from "Christian Laettner"): Christian Donald Laettner ( , ; born August 17, 1969) is a retired American basketball player whose Hall of Fame career for the Duke Blue Devils is widely regarded as one of the best in National Collegiate Athletic Association (NCAA) history.
Relevant evidence: Yes