"He's quick, he's strong and he can get to the passer," Peko said. "He's disruptive, you know? And he's willing to learn. He's always talking to Von and asking, 'Hey, what can I do?' That's good to see out of a rookie."

Chubb's "speed to power" transition also impressed Wolfe, who predicted the rookie would be an important addition to the defense.

Linebacker Josey Jewell is another player who made an early impression on Peko, and wide receiver Courtland Sutton caught Peko's attention with a highlight-reel catch on Monday.

Until the three players make the 53-man roster at the end of the preseason, though, Peko will continue to refer to the rookies by their numbers.

"Make that 53-man roster, then I'll learn your first name and second name," Peko joked. "Until then, I just try to call them by their number. That's just a rookie thing. You've got to earn the respect of the veterans.