D.K. Metcalf has faced plenty of steep competition through his first six NFL seasons, both during games and practice, but the star wide receiver has noticed something different in his first training camp with the Pittsburgh Steelers.

During an interview with Ian Rapoport and Steve Smith of NFL Network on Sunday, Metcalf discussed some of his first impressions of the Steelers. He spoke about how challenging it has been to go up against cornerbacks Joey Porter Jr., Jalen Ramsey and Darius Slay every day.

When asked how the practice competition compares to what he saw with the Seattle Seahawks, Metcalf made a bold claim about his new teammates.

“You don’t want my opinion, because I think they’re the best defense I’ve ever seen,” Metcalf said. “There’s some dogs everywhere on the field, and I tip my hat to them because they come to work every day and we don’t have any choice but to get better.”