
Kyle Fuller should probably be listed as an exclusive rights free agent. He appeared in 9 games in both 2017 and 2020. He saw the field in only 2 games in 2018 which was below the minimum for a season credit. He saw no game day action in 2019. So he currently owns two credited seasons. https://www.seahawks.com/team/players-roster/kyle-fuller/
The team has tendered defensive tackle Bryan Mone and offensive lineman Kyle Fuller as Exclusive Rights Free Agents (ERFAs), per ESPN’s Brady Henderson. For ERFAs all a team has to do is offer a one-year contract for the league minimum (which varies based on accrued seasons) and at that point negotiating with other teams is completely off the table. The minimum is $660,000 for rookies, $780,000 after two accrued seasons, and $850k for three. https://www.fieldgulls.com/2021/3/11/22324683/seattle-seahawks-news-tender-bryan-mone-kyle-fuller-as-exclusive-rights-free-agents