Anderson is visiting with the Dolphins on Thursday, NFL.com's Ian Rapoport reports.
The Broncos only extended Anderson an original-round tender, which means the team won't receive any draft compensation if the running back signs with a new team. However, Denver still has the right to match any contract, as Anderson is a restricted free agent. Even if hopes for Jay Ajayi are high, the Dolphins will likely try to sign a veteran running back after losing Lamar Miller to the Texans.