MLBs suspended pitcher Ronel Blanco of the Astros for having rosin on his non-throwing arm:

The issue involving Blanco appears to have stemmed from the use of rosin on his non-throwing hand, which is illegal. Per MLB.com’s Brian McTaggart, Blanco acknowledged after the game that he had put rosin on his left forearm, claiming he was unaware of the MLB rule. The league began cracking down on pitchers using sticky substances during the 2021 season.

Chron.com

Blanco must be a Steve Martin fan:

You.. can be a millionaire.. and never pay taxes! You can be a millionaire.. and never pay taxes! You say.. “Steve.. how can I be a millionaire.. and never pay taxes?” First.. get a million dollars. Now.. you say, “Steve.. what do I say to the tax man when he comes to my door and says, ‘You.. have never paid taxes’?” Two simple words. Two simple words in the English language: “I forgot!” How many times do we let ourselves get into terrible situations because we don’t say “I forgot”? Let’s say you’re on trial for armed robbery. You say to the judge, “I forgot armed robbery was illegal.” Let’s suppose he says back to you, “You have committed a foul crime. you have stolen hundreds and thousands of dollars from people at random, and you say, ‘I forgot’?” Two simple words: Excuuuuuse me!!“

https://snltranscripts.jt.org/

Of course, one wonders how long Blanco had this go undetected.