NBA MVP and 76ers center Joel Embiid had knee surgery. His injury could affect the US Olympic team

Philadelphia 76ers center Joel Embiid (21) looks to pass around Golden State Warriors forward Draymond Green (23) during the second half of a game Tuesday in San Francisco. (AP Photo/D. Ross Cameron)

Philadelphia 76ers center Joel Embiid (21) shoots over Golden State Warriors forward Draymond Green (23) during the first half of a game Tuesday in San Francisco. (AP Photo/D. Ross Cameron)

PHILADELPHIA — Joel Embiid’s timeline to return to the Philadelphia 76ers is still unclear following knee surgery. His availability this summer for the U.S. Olympic team is just as murky.