Some MLB roster rules:

* 10-day IL, not 15-day IL, for all players. 60-day IL is back to being 60 days, not 45.
* COVID-19 injured list is back with no minimum or maximum length of stay required.
* 28-player limit for the AAA/alt site. Only players from there can be called up.

— Chris Cotillo (@ChrisCotillo) February 9, 2021