Breaking down 49ers’ unrestricted, restricted free-agent list

The 49ers will be busy this offseason.In addition to looking outside the organization for upgrades, president of football operations/general manager John Lynch has a long list of impending 49ers free agents to address.There are three types of NFL free agents — exclusive rights, restricted and unrestricted. Here is a breakdown of what each category means and which 49ers players fall into each bucket:Exclusive rights free agent (ERFA)Any player with fewer than three accrued seasons and an expired contract. If his original team offers him a one-year contract at the league minimum (based on his credited seasons), the player cannot negotiate with other teams.49ers' exclusive rights free agents:DL Evan AndersonDL Alex BarrettLB Jalen GrahamDL Sam OkuayinonuOL Austen PleasantsTE Jake TongesTE Brayden WillisRestricted free agent (RFA)A player with three accrued seasons and an expired contract. RFAs are free to negotiate and sign with any team, but their original team can offer them one of the various qualifying offers ("tenders") that come with the right of first refusal and/or draft-pick compensation. If the tender is withdrawn by a team, the RFA becomes an unrestricted free...