When the Dallas Cowboys switched Jason Garrett for Mike McCarthy, it was the first head coach change for many playing for the Arlington-based team. For others, it was another day in the office.

Cowboys wide receiver Amari Cooper has seen his fair share of roster change. During his time with the Oakland Raiders, he played for two different head coaches — Jack Del Rio and Jon Gruden. His arrival to the Cowboys in 2018 meant a new head coach. If he resigns with Dallas in the offseason, he will play under his fourth head coach in six seasons.

By now, Cooper knows what the process is like to play for a new head coach. He also knows what it's like to not see the same assistant coaches anymore. He wasn't surprised by the Cowboys firing nearly all of the staff.

I’m not surprised,” Amari Cooper said at the Pro Bowl on ESPN (h/t Cowboys Wire). “That’s usually what happens when a head coach gets fired. He isn’t going to want to inherit a whole lot of coaches. He has to make sure everyone he has in place is on the same page as him.”

In rebuilding the coaching staff under McCarthy's eyes, the Cowboys fired wide receivers coach Sanjay Lal, who coached Cooper in both of his last two seasons.

Cooper recorded 79 receptions for 1,189 yards and eight touchdowns. His efforts got him into the Pro Bowl for the second straight season. Barring an extension or franchise tag, the 25-year-old will be an unrestricted free agent in March.