Watch Alex Len dunk all over Spurs' Boban Marjanovic

Boban Marjanovic has gained a cult following in his first NBA season with the Spurs, mainly because the 7'3" rookie has been dominant in brief stretches when he's gotten the opportunity to appear in the team's lineup. 

But he's got some work to do defensively, as evidenced by the fact that Alex Len dunked all over him during Thursday night's contest, and did so twice. 

Marjanovic got the last laugh, of course, as he finished with 17 points and 13 rebounds in just 22 minutes of action during his team's 28-point win over the Suns.