Moseley is the most notable of the group, starting nine games and playing in all 16 in 2019, recording 50 tackles, eight assists, eight passes defended and one interception. Brunskill is a close second, appearing in 14 games with seven starts, adding three postseason appearances.
Juszczyk continued to flourish in Kyle Shanahan's offense as a multitalented fullback, starting 12 games and serving as a highly effective blocker while also catching 20 passes for 239 yards and one touchdown. Williams appeared in 15 games, recording 51 tackles, two passes defended, two interceptions and four forced fumbles as San Francisco's nickel corner.
Wilson also helped San Francisco in 2019, playing in 10 games, rushing 27 times for 105 yards and four scores and catching a game-winning touchdown pass in a victory over Arizona.
Mullens is the most intriguing of the bunch, playing admirably in place of Jimmy Garoppolo in 2018 before returning to the bench in 2019. The former Southern Mississippi record-breaker remains as a reliable backup who may have some undiscovered potential.
Exclusive-rights free agents don't have the freedom to entertain offers from other teams, so they'll be back in San Francisco thanks to Thursday's tenders.