"I know this -- he's a talented football player," Carr said. "And the times I've talked to Colin, he's a great person, I've enjoyed it. Now, I can't speak for any other teams, organizations and all that, but obviously, we have quarterbacks, so he won't come here. But I wish him the best. And I hope he gets signed. I really do.
"I don't know if he wants to play, if he doesn't, all that stuff. But if he does, I really hope he gets signed because I feel like, as a football player, he can help a football team."
Carr, the Raiders' second-round draft pick in 2014, and Kaepernick, selected by the San Francisco 49ers in the second round of the 2011 draft, used to share the Bay Area football market, Carr winning the lone head-to-head matchup 24-13 on Dec. 7, 2014.
In college, Kaepernick's University of Nevada Reno Wolf Pack beat Carr's Fresno State Bulldogs 52-14 in a WAC matchup in 2009, though Carr, then a freshman, did not play in the game.
Carr was asked if he was surprised that Kaepernick, whose kneeling boycott during the national anthem before games last season caused a national uproar and debate, was still unsigned.
"It was surprising to me, just talent-wise," Carr said. "But, again, that goes not only for Colin. There's a lot of guys out there that are unsigned where you're like, 'Man, I've watched that guy on film. He's pretty good. There must be something else there.'
"So thank goodness I don't make those decisions. I just try and complete passes."