Jarrius “JJ” Robertson, the New Orleans Saints superfan who has captured the hearts of many in Louisiana, is out of surgery and has a new liver, his family said on Sunday afternoon.

“Surgery went GREAT!” Jarrius’ father, Jordy Robertson, said on his son's Twitter account. “JJ is resting now with NEW, working liver.”

Robertson said the “next few days of monitoring” will be important.

In a text message later Sunday to The Advocate, Robertson said the next 48 hours will be "the most important hours because we have to fight and protect him from infections." 

Jarrius, 15, went into surgery early Sunday to receive a life-saving liver transplant. Jarrius lives with biliary artresia, a liver disease that slows his growth. He had his first liver transplant when he was 1 year old. 

The surgery was expected to last between eight and 10 hours, but doctors were able to complete the procedure in six and a half hours, Robertson told The Advocate.

“He’s a strong young man,” Robertson said.

Donations to help with Jarrius' medical expenses can be made online at ittakeslivestosavelives.com.

More details to come.