It made me laugh when Giancarlo Stanton stated he viewed Roger Maris' single season home run record as the "legitimate" one because Maguire and Bonds were juicing, completely oblivious to the fact that his own home runs were getting a similar boost.
They changed the ball without telling anyone to the point where MGL and a couple other guys had to go on eBay to buy authenticated baseballs from certain time periods, run tests, and determine that the balls were different while MLB denied it. I've been saying this has been tainting the game for awhile, and is just another example of Rob Manfred being a terrible commissioner.