Southern Cal starting cornerback Josh Shaw isn't expected to play in the season-opener -- and is out indefinitely -- apparently for all the right reasons.

Shaw said he suffered two high ankle sprains while jumping from a second-story balcony onto concrete to rescue his 7-year nephew, who was in distress in a pool. Shaw's nephew cannot swim.

"I would do it again for whatever kid it was, it did not have to be my nephew," Shaw said on USC's athletics website.

"My ankles really hurt, but I am lucky to be surrounded by the best trainers and doctors in the world. I am taking my rehab one day at a time, and I hope to be back on the field as soon as possible."

On Tuesday, however, coach Steve Sarkisian said there were calls to the school questioning Shaw's version of events.

"He's a good person, He's a good kid," Sarkisian said after practice. He came to us with what had occurred Saturday night and I have no reason, no history to not believe Josh and his story and what has occurred. ... We're going to continue to vet it. We're looking at it."

Shaw, a senior who has played safety and cornerback for the Trojans, has been expected to help anchor the secondary. At 6-1, he is big cornerback with a high football IQ.

He'll almost certainly miss Saturday's opener against Fresno State. USC should be fine without him (it's not like the Bulldogs have Derek Carr any more), but the impact could be felt in the second game when the Trojans take on Stanford in a huge Pac-12 game.

"It is unfortunate that he'll be sidelined for a while and we will miss his leadership and play, but I know he'll be working hard to get back on the field as soon as possible," Sarkisian told the school's website.

Even USC's rivals noticed the original version of the story.

UCLA coach Jim Mora tweeted: "Best wishes to Josh Shaw for a speedy recovery, what a stud, what a role model. #Hero #RealLifeStuff"