Maybe they are, but nothing in most of these games would suggest that any more than they suggest that STL is lodged with the most absurd run of BABIP and LOB% luck in the [expletive] history of mankind.
I don't remember seeing it before either, but it's just rosin. STL would be the first to call out any cheating they aren't in on themselves. They made the umps check the ball on Greg Maddux once.