"However, there was a significant decrease in OPS for nonpitcher controls after the index date compared with before the index date (P = .003). This indicates that hip arthroscopic surgery for FAI may mitigate the career-based performance decline that is typically seen in professional baseball players."
I'm dumb so I don't really get this part of the study. There was a significant decrease in OPS for batters but this indicates hip surgery mitigates their decline?