Steelers training camp won't be the first time Rodgers and Metcalf have worked together. The two held a throwing session together at UCLA in March, according to NFL Network's Mike Garafolo. That workout may have helped convince Rodgers to sign up for a 21st season in the NFL.

Like every offseason, the league has seen a reshuffling of talent over the last few months, and, now that the cards have largely been dealt, some fascinating new quarterback-receiver duos have emerged.