The Facts: At some point, the complexity of the Dolphins offense Rosen is learning should work to his advantage. But for now, it’s a challenge. “A steep learning curve,” Rosen said after an organized team activity practice on Wednesday, his eighth with Miami.

Diehards Line: Rosen had three different offensive coordinators in three years at UCLA. And he had two offensive coordinators in his only season in the NFL, at Arizona. So Rosen has seen a lot. And that should help — eventually. Rosen, 22, is extremely intelligent. But he was acquired in a trade on April 26. And veteran Ryan Fitzpatrick, 36, was signed on March 18. So that’s more than a one-month head start for Fitzpatrick, who also possesses savvy leadership skills. Rosen is learning his teammates. And trying to be respectful of Fitzpatrick’s accomplishments in the league, while in direct competition. Coach Brian Flores is careful to generally mention both quarterbacks when asked about one. He’s also candid about Rosen’s room to grow. “He’s smart,” Flores said this week. “He’s got a big arm. He’s talented. He’s got some leadership ability. But he’s got a lot to learn. There’s no doubt about that. This offense, it’s not an easy one to learn. There’s something new every day. He’s improving, he’s getting better every day. I like that.” Rosen will have three mandatory mini-camp practices next week. Then he has about six weeks to study the play book on his own before training camp. Another advantage that should pay off for Rosen this season is facing Flores’ complex defensive scheme, which uses combinations of three to five defensive linemen as well as three to six defensive backs, in practice. Every little bit helps.