Steve Young, in an interview, stated that he played 18 seasons of football.
However, if you look at the Wikipedia page on him, it lists 17 seasons (15 in the NFL, 2 in the USFL), not 18.
How can this discrepancy be resolved? I'd like to think that you could trust his own word on this over Wikipedia, but at the same time I just don't see how he came up with 18, it doesn't make sense.