No he is not.
Dikembe Mutombo was a NBA player from 1991 to 2009. He started the Dikembe Mutombo Foundation in 1997. He built the Biamba Marie Mutombo Hospital in Kinshasa which opened in 2007.
Houston Rockets
Are you talking of the 7'2 recentlly retired Dikembe Mutombo?
Dikembe Mutombo
Dikembe Mutombo Mpolondo Mukamba Jean-Jacques Wamutombo
From Africa, Dikembe Mutombo played for the Houston Rockets. He was 42 in his last game on April 21, 2009 against the Portland Trailblazers in Portland in game 2 of the NBA playoffs. He suffered a knee injury and was carried off in a stretcher. The next day, he confirmed that his basketball career had ended.
THESE ARE THE PLAYERS THAT ARE LISTED OVER 7"0 WHO CURRENTLY PLAY IN THE NBA YAO MING SHAQUILLE O'NEAL shawn bradley Zydrunas Ilgauskas Dikembe Mutombo ROY HIBBERT Kyrylo Fesenko ROBERT SWIFT JOEL PRZYBILLA TYSON CHANDLER HAMED HADDADI
P. J. Brown has played in the NBA for 15 years. Dikembe Mutombo has played for 18 years. Shaquille O'Neal has played for 19 years
Dikembe Mutombo, LeBron James, Carmelo Anthony, Zach Randolph, Tracy McGrady, Dwight Howard, Chris Bosh, Kevin Durant, Russell Westbrook, Deron Williams, Derrick Rose, Gerald Wallace, Yao Ming, Vince Carter, Amar'e Stoudemire (accurate as of first half of 2011)
Dikembe Motumbo played in the N.B.A for 18 years before retiring in 2009. Moe information about his Career can be found in the related link.
Dikembe Mutombo has: Played himself in "Live with Regis and Kathie Lee" in 1988. Played himself in "1992 NBA All-Star Game" in 1992. Played himself in "1995 NBA All-Star Game" in 1995. Played himself in "1996 NBA All-Star Game" in 1996. Played himself in "1997 NBA All-Star Game" in 1997. Played himself in "1998 NBA All-Star Game" in 1998. Played himself in "The Sport Jerks" in 1998. Played himself in "2000 NBA All-Star Game" in 2000. Played himself in "2001 NBA All-Star Game" in 2001. Played Arch Player Coyner in "Juwanna Mann" in 2002. Played himself in "2002 NBA All-Star Game" in 2002. Played himself in "Last Call with Carson Daly" in 2002. Played himself in "The 2003 NBA Finals" in 2003. Played himself in "Rome Is Burning" in 2003. Played himself in "Tavis Smiley" in 2004. Played himself in "The Apprentice" in 2004. Played himself in "21st Annual Trumpet Awards" in 2013.
The NBA has been awarding a Defensive Player of the Year award since 1983. As of the 2008-09 season, two players have won the award 4 times, Dikembe Mutombo (1995, 1997, 1998, 2001) and Ben Wallace (2002, 2003, 2005, 2006). No other player has won the award more than twice.