With the HoF announcement today, it got me thinking... what milestones are left for a guy after retirement that could influence his card values? During his career there are lots: ML debut, a breakout season, hitting a milestone, etc.
After retirement, election to the HoF might cause a spike in interest. There are also hobby-related things like a previously tough signer having autos included in a set. Other than that, would the guy's death be the only hobby-influencing factor left?