As Major League Baseball enforces a crackdown on unauthorized grip substances, Rob Manfred is seeing progress throughout the game.

Many pitchers have been outspoken about their displeasure with the shift in rules in the middle of the season.

"My view is the first two days have gone very well," Manfred told The Athletic on Wednesday. "We've had no ejections [for foreign substances], players in general have been extremely cooperative, the inspections have taken place quickly and between innings. Frankly, the data suggests that we are making progress with respect to the issues [in spin rate] that caused us to undertake the effort in the first place."