In the Broncos’ season opener against the Seahawks, they are facing a familiar foe with new faces, and that has created a game-planning challenge. Led by first-year head coach Mike Macdonald, Seattle’s staff is much different than the last time both teams faced off in 2022. That includes offensive coordinator Ryan Grubb, who has never coached in the NFL. Grubb spent the last two seasons at the University of Washington, where he helped turn former Huskies quarterback Michael Penix Jr.