In a memo sent to all teams on Wednesday, MLB outlined revised protocols for players, which include more stringent rules to prevent further outbreaks.

As COVID-19 outbreaks among both the Miami Marlins and St. Louis Cardinals have caused MLB to make drastic changes to its schedule, the league reportedly has sent revised protocols to its teams on Wednesday.

The new protocols, according to USA Today‘s Bob Nightengale, are tougher than the original rules the league established at the onset of the 2020 season.

“Everyone must be accountable for their own conduct because the careless or reckless actions of a few can impact the health and well-being of everyone,” the league said in a memo, per Nightengale.

The new protocols threaten suspension for repeated violations of health and safety measures, including failure to wear face coverings when required, Nightengale reports. They require players to wear masks at all times when not on the