San Francisco is Sherman's first visit and Pelissero reports that meetings with the team will continue through the afternoon.
If healthy, Sherman, a four-time Pro Bowl selection who excels in physical man-to-man coverage, would be an ideal fit for the 49ers' 4-3 defense.
Seattle plays the 49ers twice every season in the NFC West. Sherman is also somewhat familiar with the scheme run by 49ers defensive coordinator Robert Saleh.
Sherman played just nine games in 2017 before sustaining a season-ending ruptured Achilles tendon.
"I plan on playing five or six more years whether it's here or elsewhere", Sherman said. Smith, who caught Sherman's tip of a Colin Kaepernick pass for a game-clinching interception in the 2014 NFC title game, is under contract with the 49ers through 2021 after signing with them previous year.
But Sherman said at the Sports Star awards he thought he would be ready for the beginning of mini-camp. Sherman calls his free agency an "ongoing process".
San Francisco started the offseason with a $137.5 million pact with impending free agent Jimmy Garoppolo. The 49ers are a rapidly improving team with plenty of cap space. Maybe they were just asking to ask-after all, Quinn complained about not being able to interview troubled 2017 draft prospect Joe Mixon at the combine, even though the Lions were nearly certainly not going to draft him.
Sherman was an overlooked fifth-round draft pick who went on to become a two-time All-Pro who helped anchor a defence that was the league's best for several years.