Jermaine O'Neal block James Johnson dunk attempt at the rim with one hand Preseason

Joakim Noah Block at the rim Tyler Hansbrough dunk attempt Preseason

Dwight Howard block Udonis Haslem shot attempt into the crowd Preseason

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Dwight Howard block on LeBron James shot attempt Preseason

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Jason Maxiell chasedown block Kyrie Irving shot Preseason

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Roy Hibbert great block on Joakim Noah lay up attempt Preseason

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Jermaine O'neal Block Andrea Bargnani's reverse dunk attempt Nba Preseason

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Ron Artest block Peja Stojakovic three pointer and lands to the crowd Lakers Mavericks West Finals

Chris Bosh big block on Ray Allen for Dwyane lay up Heat Celtics East Semi Finals

Josh Smith block from behind Ronnie Brewer shot off the backboard Bulls Hawk East Semi Finals

Nazr Mohammed Block to the Backboard a Darrell Arthur dunk Attempt Grizzlies Thunder Semi Finals

JaVale McGee Brutal one hand block grabing the ball on Wesley Matthews vs Portland Trail Blazers

Kris Humphries block hard at the rim a Robin Lopez dunk attempt vs Phoenix Suns

Demar DeRozan Block Shawn Marion and runs for the dunk vs Dallas Mavericks

Tyreke Evans swat block to the backboard a D J Augustin lay up vs Charlotte Bobcats

Semih Erden big block on Christian Eyenga loob layup try vs Cleveland Cavaliers

Boozer block Bogut and Derrick Rose run for the up and under reverse layup vs Milwaukee Bucks

Serge Ibaka monster block on Amare Stoudemire jumper shot vs New York Knicks

Derrick Rose rises up for the block on Daniel Gibson the jump shot vs Cleveland Cavaliers

LeBron James big swat block on Jerryd Bayless layup try vs Toronto Raptors