"I just remember Pat as being always to himself. He wasn't like a person who would cause trouble for no reason," said Senque Carey, who played basketball with Dennehy on the University of New Mexico team before Dennehy transferred to Baylor his junior year.
Dennehy didn't have many close friends among his teammates in New Mexico, but he remained close to Carey.
The two had known each other since middle school and had played basketball together for St. Francis High School in Mountain View, Calif. When Carey joined the University of New Mexico team, Dennehy followed him.
Now, Carey is left wondering whether his friend is still alive.
Authorities and Baylor officials say Dennehy, 21, hasn't been heard from in more than two weeks. His sport utility vehicle was found abandoned in a parking lot last week in Virginia with its license plates missing, and police in Texas have said they fear Dennehy may have been the victim of homicide.
Investigators believe the 6-foot-10, 230-pound center might have been killed in the Waco area, where Baylor is located, though they won't say what led them to that conclusion.
They have searched Dennehy's apartment at least twice, the Waco Tribune-Herald reported Saturday, and they sent at least one detective to Virginia Beach, Va., to examine Dennehy's vehicle.
Among the people detectives have been questioning have been his Baylor teammates.
Dennehy's stepfather, Brian Brabazon, told the Waco Tribune-Herald someone had recently stolen money from his stepson and that Dennehy had told Baylor coaches he was scared.
But Carey said Dennehy wasn't involved in anything — drugs, gangs, gambling — that would put him in danger. His group of friends was small but varied, because the quiet young man fits in with a lot of different people, he said.
The circumstances of his disappearance don't fit his personality, he said.
"I don't think Pat would ever leave and not call anybody," Carey said. And driving all the way to Virginia and removing his license plate is even less likely, he said.
Waco police spokesman Steven Anderson said police have interviewed Baylor players, among other people, in the disappearance, which seems strange to Carey.
He said he didn't know the Baylor team but can't imagine what could drive a teammate to hurt Dennehy.
"It's just kind of weird," he said. "I can't think of a situation where someone would become that angry, let alone a teammate."
Carey said he's holding out hope that Dennehy is alive somewhere and OK.
"As long as he's alive, that's all I'm worried about," he said