When mound holes become too much of an issue, pitchers can call the grounds crew out to fix it. You can see from this video of a Zack Greinke start that the mound isn’t made up of infield dirt.

Central Connecticut pitcher Michael DeLease throws off a smart mound at the Center for Motion Analysis in Farmington, Conn. on Tuesday, Jan. 28, 2020.

For a week in January, researchers there conducted a study of pitchers using a new tool, the “smart” mound, developed by a company called Newtforce.