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?

Context paragraphs:
Sam Pellom: Samuel Troy "Sam" Pellom (born October 2, 1951) is a retired American basketball player born in Wilmington, North Carolina.  The 6'9" forward-center played professionally for the Atlanta Hawks and the Milwaukee Bucks of the NBA and played college basketball at the University at Buffalo, and to date the only player that ever played in the NBA for that university's basketball team.  Pellom also played for the Washington Generals, the team that plays the Harlem Globetrotters.

Bernard Toone: Bernard Toone (born July 14, 1956) is a retired American basketball player born in Yonkers, New York.

List of Memphis Grizzlies head coaches: The Memphis Grizzlies are an American professional basketball team based in Memphis, Tennessee.  The Grizzlies play in the Southwest Division of the Western Conference of the National Basketball Association (NBA).  The team was founded in Vancouver, British Columbia in 1995 along with the Toronto Raptors as part of the NBA's expansion into Canada.  The Grizzlies and the Raptors became the first non-United States teams to join the NBA since 1946.  After spending six seasons in Vancouver, the Grizzlies relocated to Memphis in the .  The Grizzlies have played their home games at the FedExForum since 2004.  The Grizzlies were owned by Michael Heisley and several locals including J. R. Hyde, Andy Cates, and Elliot Perry.

Neil Johnson (basketball): Neil A. Johnson (born April 17, 1943) is a retired American basketball player born in Jackson, Michigan.

Charlie Williams (basketball): Charles E. "Charlie" Williams (born September 5, 1943) is a former professional basketball player born in Colorado Springs, Colorado, USA.  A 6’0” guard from Stadium High School (Tacoma) and Seattle University, he played in the American Basketball Association (which later joined the NBA in the ABA-NBA merger) in the late 1960s and early 1970s.  The highlight of his career was in 1968, when he teamed with Connie Hawkins to lead the Pittsburgh Pipers to the 1968 ABA Championship.  Williams also played in the 1969 and 1970 ABA All-Star Games.  He retired in 1973 with 6,020 total points and a career scoring average of 16.2 points per game.

Michael Heisley: Michael E. Heisley (March 13, 1937 – April 26, 2014) was an American businessman and former majority owner of the Memphis Grizzlies.  He orchestrated the move of the team from Vancouver in 2001, after promising to keep the franchise in Vancouver when he purchased it in 2000.  He agreed in 2006 to sell his 70% controlling stake in the Grizzlies to a consortium including Christian Laettner and Brian Davis, but the group missed a deadline for the purchase and Heisley found no other bidder willing to meet the team's $300M asking price.

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.  He was the star player on the back-to-back National Championship teams of 1991 and 1992.  He is particularly famous for his game-winning shot against Kentucky in the 1992 regional final and for the hatred he received from opposing fans.

Dick Grubar: Richard Arthur "Dick" Grubar (born July 26, 1947) is a retired American professional basketball player who spent one season in the American Basketball Association (ABA) as a member of the Indiana Pacers during the 1969–70 season.  Born in Schenectady, New York, he was drafted out of the University of North Carolina during the 1969 NBA Draft in the sixth round (83 pick overall) by the Los Angeles Lakers, but he never signed with them.

John Block (basketball): John William Block, Jr. (born April 16, 1944) is a retired American basketball player born in Glendale, California.

Robert Pera: Robert J. Pera (born March 10, 1978) is the founder of Ubiquiti Networks, Inc. a global communications technology company that Pera took public in 2011.  In October 2012, Pera also became the owner of the Memphis Grizzlies, when he purchased the National Basketball Association franchise from Michael Heisley.  At the age of 36, Pera earned a spot on Forbes’ list of 10 youngest billionaires in the world.

Supporting paragraphs: Michael Heisley Christian Laettner
Answer: Christian Donald Laettner