To me there’s a lot more debate about cards like McGwires RC, such as 1988 is his rookie cup card, which would make his 1987 his rookie. He is pictured in his USA uniform and is referred to as being on the 1984 USA national team, which is not associated with MLB at all. It is the same as the USA cards we have now, and those are not rookies. His MLB debut was in August of 1986, hence no MLB cards in 1986. So, to me his rookie is 1987, the first card after his MLB debut. Got it, Beckett says 1985 is his RC, but they are not the deciding factor for the entire hobby. I don’t know if this debate would ever be over, just like the current debate about whether the 2021 Bowman’s Best is Wanders actual RC, not the 2022 cards. There may never be a consensus on which cards it is.
Either way, if we can get this up and running, I would probably give it a go.