Connor Warwick, a 16-year-old honor student who also plays basketball, tennis and dek hockey, is one of three patients in critical condition at Forbes Hospital.
One of his teammates on the varsity tennis team, Greg Keener, is with him in the intensive care unit.
The two grew up together and live near each other in Murrysville.
"Yesterday [Thursday] the whole tennis team showed up. They made T-shirts," said Connor's aunt, Joyce Warwick. "The support from his family and friends has been out of this world."
Two Pittsburgh Penguins, Beau Bennett and Robert Bortuzzo, also paid a visit to the unit. The players gave Connor a hockey stick from a game, signed by the team, and also signed autographs for everyone.
Connor suffered injuries to his gall bladder, liver, stomach and pancreas, his family said. Doctors have been able to repair most of the damage, but they had to put a stent in his pancreas.
"That's something they will have to watch closely," said Joyce Warwick. "It's a difficult injury. The pancreas is so fragile."
Connor was in surgery for four hours on Wednesday.
When he woke from anesthesia, he didn't ask about his condition. Instead, the first thing he said was that he wanted someone to write thank-you letters to his doctors and his teachers for saving his life.
"I was blown away," said Joyce Warwick. "That's just how he is. He's the kind of kid any parent would be proud of."
Connor was in the biology wing of the school when the attack occurred.
"He'd been in school for 30 seconds," said his mother, Mary Warwick.
His math teacher and his gym teacher placed him on a table and applied pressure to his wound until paramedics took over.
Unable to eat or drink, he's being fed intravenously.
"He has not had one single complaint," said Joyce Warwick.
Connor, an only child, is the son of Robert Warwick, owner of the Monroeville accounting firm Robert Warwick & Associates, and Mary, the office manager.
He excels at school, his family said. He's an analytical sort who especially enjoys math and statistics, and he likes running fantasy sports leagues.
He's good in real sports, too. A 6-foot-1, 200-pound sophomore, he competes in doubles on the varsity tennis team and played junior varsity basketball this year. He also plays on a traveling hockey team out of Murrysville Dek Hockey.
"Connor is a courageous young man who should make Pittsburgh proud," said his uncle, Jack Warwick.
Torsten Ove: email@example.com or 412-263-1510.