The San Francisco 49ers have more issues than merely finding a new head coach after the team and Jim Harbaugh parted ways last week. The Niners have 17 free agents -- 15 unrestricted and two restricted -- as they enter the 2015 offseason. The new league year opens at 4 p.m. ET March 10, when unrestricted free agents can sign with any team.

Six of the Niners' free agents are key players -- five-time Pro Bowl running back Frank Gore, three-time Pro Bowl offensive lineman Mike Iupati, receiver Michael Crabtree, whose 10.3 yards per catch average was a career low, linebacker Dan Skuta, who has started 18 games over the past two seasons, and both startering cornerbacks in Perrish Cox, whose five interceptions led the team, and Chris Culliver, who had four interceptions in the Niners' final seven games.

Beyond that, the Niners may also lose defensive end Justin Smith to retirement after having “terminated” the contract of fellow DE Ray McDonald.

Here's a list of the 49ers' unrestricted and restricted free agents:

Unrestricted:

Blaine Gabbert, quarterback

Josh Johnson, quarterback

Frank Gore, running back

Alfonso Smith, running back

Phillip Tanner, running back

Michael Crabtree, wide receiver

Brandon Lloyd, wide receiver

Kassim Osgood, wide receiver

Mike Iupati, left guard

Dan Skuta, linebacker

Desmond Bishop, linebacker

Chris Culliver, cornerback

Perrish Cox, cornerback

Chris Cook, cornerback

Bubba Ventrone, safety

Restricted:

Garrett Celek, tight end

Kyle Nelson, long snapper