Mike Glennon might attract a large contract from some quarterback-needy team, but a league source said Tuesday morning it will not be from the 49ers.

The 49ers have no interest in signing Glennon to take over as quarterback, a league source told CSNBayArea.com. The 49ers had been reported as one of the teams that might pursue the Tampa Bay Buccaneers backup quarterback.

Glennon, 27, has attempted just 11 passes the past two seasons as Jameis Winston’s backup. In 2013 and ’14, he started 18 games. The Buccaneers were 5-13 in those games. Tampa Bay selected Winston with the No. 1 overall pick in the 2015 draft.

In his career, Glennon has completed 59.4 of his 374 pass attempts for 4,100 yards with 30 touchdowns, 15 interceptions and a passer rating of 84.6.

The 52-hour open-negotiating period began for scheduled free agents on Tuesday at 9 a.m. Teams are allowed to enter into negotiations with the agents of free agents, but contracts are not allowed to be signed until Thursday at 1 p.m.

The 49ers do not have any quarterbacks under contract for the 2017 season. Colin Kaepernick opted out of his contract to become an unrestricted free agent, along with Blaine Gabbert, Christian Ponder and Thad Lewis.