[LansdowneSt]

If you turn off development- even with recalc on - you MUST, MUST, MUST have retire according to history ON. Natural aging is part of development. You turned off aging in that one test sim.

Nothing is broken. Those cut short guys used to age in a natural fashion because you had development ON (with or without recalc, your choice). The immortality issue is because of your chosen settings. You turned off Retire According to History to see what Gehrig or Koufax did but did not ALSO turn on development (separate toggle).

EDIT: The above "triple MUST" is true for regular historical play, but Retire-According-to-History won't help if you have players out of their real-life years.