Solved

Keep the legacy of driver alive who retires

If i am not wrong if a driver retires he completely disappears from game, I believe if any drivers retires so he can keep his legacy with the last team he raced for.

They don't disappear actually! Thankfully you can still access them even after they have retired and see all of their stats just like an active driver.

Just make sure you have their link saved, and voila, legacy saved :D

Or have him on the shortlist.