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Specifically, he fractured his lateral tibial plateau in his left knee.
Kobe was still working his way back into game shape after returning from an Achilles tear. Three weeks ago, before the Lakers saw him play after the Achilles
It's a personal blow for Kobe, who only played six games in between major injuries.
It's also a blow for the Lakers going forward if Kobe can't find some sustained health. He actually took a pay cut in that extension, but he's still going to be the highest-paid players in the league until his contract runs out.