:Every ABC Sports broadcast of the Indianapolis 500 (and I would assume plenty of other AOWR races) between 1983 and 1992, when they raced together at the same time, showed Al, Sr.'s name as simply "Al Unser," and Jr.'s name as "Al Unser, Jr." Likewise, when he won the 1987 Indianapolis 500 was run, Paul Page, then the Voice of the 500 (chief announcer of the radio broadcast), referred to The Second Four-Time Winner of the Indianapolis 500-Mile Race (capitals for the implied effect)...as Al Unser. Sr. thus seems to be a verbal, but not statistical/official name/etc., disambiguation for viewers/listeners who they felt might have otherwise become confused.