He earned it.
Sure, the fractured rib of starting quarterback Cam Newton makes keeping three quarterbacks a necessity instead of a luxury. Newton won't begin seriously throwing again until Saturday, and by then the Panthers must have their 53-man roster set.
Even though coach Ron Rivera repeatedly has said he's confident Newton will be ready for the Sept. 7 opener at Tampa Bay, he can't risk cutting Webb and then finding out his franchise quarterback can't play.
That would leave Carolina with backup Derek Anderson and searching the trash pile for a backup. They can't depend on Webb being available as well as he's played during the preseason, completing 21 of 35 pass attempts for 271 yards and two touchdowns.
He's also rushed four times for 30 yard.
That's why this post began with Webb didn't back into a roster spot. The Panthers began talking about keeping the former University of Alabama at Birmingham star after the second preseason game.
Rivera reiterated that after Tuesday's practice when the conversation turned to how Newton's injury opened up a spot for Webb.
"It's a tough position to be in, because obviously we are going to have to let a good player go to keep the extra quarterback," Rivera said. "Because of our situation, we need to. This is a necessity move.
"But at the same time, Joe's earned that. He earned his right to be on this football team right now."
Carolina coaches talked to several of Webb's former coaches before signing him to imitate what Newton does with the read option after Newton underwent ankle surgery in March.
"They thought what we do would be a good fit for what his skill set was," Rivera said. "A lot of people thought doing some of the stuff we do with Cam would fit with him.
"They're right. Those things do fit Joe very nicely. I like who Joe is. He's a hard-working, very conscientious young man who wants to do well."
Webb spent his first three seasons with the Minnesota Vikings after being selected in the sixth round of the 2010 draft. He played quarterback for the first two, starting a playoff game in 2012.
He was moved to wide receiver in 2013, catching five passes for 2013 yards. There was a time when he thought he'd never play quarterback again. Now he's getting a chance to do that at Carolina, and possibly setting the stage for a future there with another team.
"I know I'm not only performing for the Carolina Panthers, but for 31 other teams out there," Webb said. "Pretty much your game film is your résumé and you want to put your best performance on it.
"I would never want to wish for somebody to get hurt for my benefit. It was an unfortunate situation. It's just a blessing for me to come in and show my talents to the coaching staff. I wish Cam all the best and to get well soon. In the meantime, I'm going to do my best to fill the void."