Do you have a link or can you provide more context? I would never be surprised by any pitcher using a substance (I think many of them certainly are), but Freddy Peralta has had very consistent spin rates throughout his 4 year MLB career. Same story for Burnes, he has reportedly had remarkable spin rates since his amateur days. That’s not to say they couldn’t still be using something, but at least the track record indicates some consistency. Other pitchers, such as Jimmy Nelson, have gone from having slightly below average spin rates in the past to now having among the highest spin in baseball this season. Seems like those outlier jumps in spin rate are more likely to appear as a red flag.