Found this explanation on another site regarding Nijman’s status.
“2019 - PS for 11 games, inactive for 3 and on IR for last 2 regular season games. 5 games =no accrued season.
2020 - Active for 16 games (+ post season) - 1 accrued year.
2021 - Active for 17 games (+ post season) - 2nd accrued year.
ERFA= Any player with less than 3 years of accrued and an expired contract. He signed ERFA contract (1 year deal for minimum salary) in 2021. Since he still doesn't have 3 years accrued he is, again, eligible for ERFA contract in 2022. In 2023 he'll be an RFA requiring a 2nd or 1st round tender.”
You need 6 games on active/inactive/PUP to qualify as an accrued season.
So there is confusion between reporting sites as to what’s what.