A person familiar with the move says that San Francisco free agent quarterback Alex Smith will visit with Miami.
The person spoke to The Associated Press on condition of anonymity because the team has not announced Sunday's meeting.
Smith's visit with the Dolphins comes after Peyton Manning worked out for San Francisco coach Jim Harbaugh last week at Duke. The 49ers are one of the finalists in the Manning sweepstakes, along with the Denver Broncos and Tennessee Titans.
Manning also worked out for the Broncos and Titans last week, with team executives saying he looked good throwing the football.
Smith and Manning have the same agent, Tom Condon.