SQL*LOADER and invalid dates

Is there a way to specify something in a SQLLDR control file so that when trying to load a date, it will default to NULL if the date is invalid?

I know you can do this, for example:

   DATE_OF_BIRTH date "YYYYMMDD" nullif DATE_OF_BIRTH=BLANKS,

but is there any way to do something like:

   DATE_OF_BIRTH date "YYYYMMDD" nullif DATE_OF_BIRTH=INVALID, Received on Sun Jun 29 1997 - 00:00:00 CDT