Answer
Jonas Valančiūnas' career-high points in a single game is 39. He achieved this feat on January 28, 2019, while playing for the Memphis Grizzlies against the Oklahoma City Thunder. Valančiūnas had a dominant performance that night, shooting 15-of-23 from the field and grabbing 15 rebounds. He also dished out 5 assists and blocked 2 shots.