Verner, 25, could wind up being a replacement for Darrelle Revis, who might be traded or cut to create more salary-cap room for the Buccaneers.
Deals for offensive linemen were highlighted by Pro Bowl left tackle Branden Albert's five-year contract with the Dolphins. Albert left Kansas City to take over the position played at the start of last season by Jonathan Martin, whose exit from Miami in October led to an NFL inquiry into bullying on the team.
Late Tuesday, Martin was traded by the Dolphins to the 49ers.
Left tackle Jared Veldheer and the Cardinals agreed to a five-year contract worth up to $35 million. Veldheer left the Raiders, who replaced him by giving former Rams lineman Rodger Saffold a five-year deal. Another left tackle, Eugene Monroe, agreed to a five-year contract to stay with the Ravens.
Former Jets right tackle Austin Howard agreed to a five-year, $30 million contract, with $15 million guaranteed after starting every game the last two seasons in New York.
Guards switching teams: Zane Beadles was joining the Jaguars from the Broncos, pending a physical; the Falcons agreed to terms with Jon Asamoah, who left the Chiefs; the Redskins struck a deal with Shawn Lauvao, who left the Browns. The Redskins also agreed to terms with Cardinals receiver Andre Roberts and special teams standout Adam Hayward and scheduled a visit with cornerback Corey Graham.
The Jaguars also were busy, including a trade that sent quarterback Blaine Gabbert to the 49ers for a sixth-round draft pick, an agreement with former Vikings running back Toby Gerhart, and re-signing cornerback Will Blackmon to a two-year deal.
Kick returner and receiver Dexter McCluster went to the Titans from the Chiefs; defensive end Arthur Jones joined the Colts from the Ravens; defensive end Tyson Jackson and defensive tackle Paul Soliai joined the Falcons; and defensive tackle Earl Mitchell left the Texans for the Dolphins.