About an article regarding the NBA

Hello everyone,

The following is a passage from a newspaper article about the NBA. Unfortunately, I don't quite understand what it means, although I read it several times while consulting dictionaries. Could you parapharase it for me? Besides, please tell me the meaning of the three phrases: "in the paint," "face-up jumpers," and "a monster on the glass."

"And then when all else fails, you've got to gurard Millsap," Lillard lamented. "He's a handful for guys to guard because he's in the paint, he's making face-up jumpers, he's making 3s. In transition, you've got to find him, and then he's a monster on the glass."