SANTA CLARA — Free agency offers are officially legal, signaling the 49ers’ first chance to replenish their roster after a 6-11, last-place effort ended their NFC reign.

It’s also other teams’ initial chance to poach 49ers players, and the first one reportedly off the market is offensive tackle Jaylon Moore.

Moore, after 12 starts last season as the 49ers’ swing tackle, agreed to join the three-time reigning AFC Champion Kansas City Chiefs, as first reported by ESPN’s Adam Schefter. It is a two-year, $30 million deal with $21.24 million fully guaranteed.

Arguably the greatest mystery 49ers fans want solved is whether Joey Bosa will join younger brother Nick on the defensive line, although the elder Bosa has been on the market since getting released Thursday by the Los Angeles Chargers.

As for in-house drama, the 49ers have yet to reach agreements that would keep a slew of starters from becoming unrestricted free agents, those being linebacker Dre Greenlaw, cornerback Charvarius Ward, safety Talanoa Hufanga and guard Aaron Banks.

The majority of deals can not become official until the new league year begins Wednesday at 1 p.m., unless it involves a player who is re-signing with a team or has been released prior to free agency. That is also when trades can become official, including Deebo Samuel’s from the 49ers to the Washington Commanders for a fifth-round pick.

NO MORE MOORE 

Jaylon Moore’s fourth and final season with the 49ers served as a fruitful springboard into free agency. Moore has spent most of his career as a fill-in starter for left tackle Trent Williams, who missed the final seven games last season but is expected to return next season.

Moore started five games last season before a quadriceps injury sent him onto the injured reserve list on Christmas. He was a 2021 fifth-round draft pick who started 12 of the 55 games he played for the 49ers.