Eight months ago, Champ Kelly wasn’t even part of the Miami Dolphins’ front office.

Now, named interim general manager after the Friday firing of ex-GM Chris Grier , he’s the primary executive handling the team’s transactions ahead of the NFL trade deadline at 4 p.m. Tuesday.

Kelly, 45, is tasked with making Dolphins moves in the coming days that could establish the preliminary foundation for what is likely another rebuild brewing over the coming months and years. As he manages Miami’s roster for the final nine-plus weeks of the season, with coach Mike McDaniel alongside him , he can also make his case to owner Steve Ross to keep the job full-time before the GM vacancy is opened up to outside candidates upon the dawn of the offseason.

While Grier was previously unwilling to part

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