Dolphins general manager Jeff Ireland is willing to keep Bush, but the organization believes rookie Lamar Miller is just beginning to step into his potential. At 218 pounds, Miller runs a 4.4-second 40-yard dash and has seen an increased workload this month.
That doesn't mean the Dolphins are looking to part ways with Bush, who accounted for three touchdowns in Sunday's win over the Buffalo Bills and has been the team's most consistent skill player two seasons running.
Bush is closing in on his second 1,000-yard season, but the feeling in Miami is that the Dolphins finally are working from a position of strength in the backfield. That perspective should make for an interesting offseason in South Beach.
Follow Marc Sessler on Twitter @MarcSesslerNFL.