We'll state the obvious, she/he should not pitch that day.
A player is marked as ineligible whenever pitching activity tracked within ChangeUp triggers a pitching rule that determines that the player in question should be resting and should not pitch that day.
While ChangeUp cannot prevent a pitcher from pitching, players that should be resting are clearly highlighted in red.
Because today's modern baseball player frequently trains year-round and plays for multiple teams, often with overlapping seasons, whether or not a pitcher is eligible to (or should) pitch on any given day can easily be determined outside of a coach's purview. To combat this, ChangeUp's player-centric model enables tracking of pitching activity across multiple teams (and seasons), and determines and stores eligibility at a player level. Coaches, please pay attention to eligibility status...your pitcher may have thrown for another team recently and decided not to tell you about it.
ChangeUp never prevents a pitcher from entering a game when she/he is determined to be ineligible to pitch, it simply informs coaches that the pitcher should be resting.