Jake Arrieta estimates that he has been drug tested between 10 to 15 times over the last year for performance-enhancing drugs.
Anthony Rizzo, Arrieta's Chicago Cubs' teammate, called for more testing after Starling Marte was suspended 80 games earlier this week.
"Rizzo and a couple of other guys had a blood test after the game a couple of nights ago," Arrieta told 670 The Score. "I've had it happen before. I think they do a pretty good job of doing it before the game, after the game, so it makes it harder for guys to get around the system. Unfortunately, I think you're going to continue to see some guys try. But it just shows with a guy like Marte getting caught, the system is working.
"The safety of the players and the health of the players is one of the main concerns. Also, keeping the playing field level. I think there are things we can do within the rules to keep us healthy, to help our bodies recover the best of our abilities. Obviously, there are things out there on the banned list for a reason, because they do work."
Arrieta is 2-0 with a 2.89 ERA in three starts this season.