Here's an excerpt from ESPN's Jeff Passan about ABS over the weekend, and Trout had the most challenges. He also notes that Trout had the best first five days of the season

For much of the 2010s, Trout was universally regarded as the best baseball player on the planet. Recent years have been unkind to him health-wise, which is why seeing him act with such confidence at the plate was a welcome sign.

Over the first three days of challenges, Trout asked for more than any player: four total, three of them successful. He has always commanded the zone and could wind up being one of the biggest beneficiaries if he can continue to use ABS to work himself into hitters' counts. Nobody in baseball had a better first five days of the season than Trout.