Miller, who has been designated as the team's franchise player, has not attended the Broncos' offseason program, but he joined the team for its White House ceremony Monday.
Miller and the Broncos have until July 15 to agree to a long-term contract or he will have to play the 2016 season under the one-year franchise tender of just over $14 million. As the "exclusive rights" franchise player he can negotiate only with the Broncos and can receive offers from no other teams.
ESPN Broncos reporter Jeff Legwold contributed to this report.