Davis Bertans always jumps. Always, for as long as I’ve seen him play. If he’s the last line of defense, he’ll try to contest shots at the rim, no matter how often he gets dunked on, which is pretty often. He might get posterized on one play and in the next one go for the block again. He always jumps.
Back when he was younger and playing in the back line of a zone defense for Serbian club Partizan, I wrongly blamed youthful exuberance for it. He was almost always the most athletic guy on the court for his club and he seemed to relish challenging guys at the rim.