Nnamdi is still winning.
CBS Sports breaks down how players are paid in the playoff. Nnamdi falls under this rule which makes him eligible for the full amount.
Players who aren’t on the 53-man roster at game time that spent at least eight games on the roster (regular season or playoffs) provided they’re not under contract to another team in the same conference.
So, if 49ers win the Super Bowl he gets $134k.