"They come to work every day and we don't have any choice but to get better," Metcalf said of practicing against the Steelers in training camp.

Pittsburgh's defense also includes fellow newcomers in defensive backs Chuck Clark and Brandin Echols, rookie outside linebacker Jack Sawyer, rookie nose tackle Yahya Black and rookie first round pick Derrick Harmon, who is slated to start alongside seven-time Pro Bowler Cameron Heyward on the defensive line.