regarding roster construction rules, this is what i believe we're waiting to hear on: --60-day injured list has been replaced by a 45-day injured list. normally, the 60-day injured list removes a player from the 40-man roster and opens up a spot. unclear if the same applies here, but likely does. --rules were in place for the 27th man for days when more than one game was being played or completed. will the 30-man, 28-man and 26-man rosters each be plus one for such situations? --rule 5 draftees must be carried on the active roster for at least 90 days and may spend the rest of the season on the injured list in order to be kept by the claiming team. the 2020 season will be shorter than 90 days, so it's unclear how rule 5 draftee assignments will be handled. --we don't know how opt-out clauses in minor league contracts will work. normally, they allow a player to declare free agency if he isn't added to the 40-man or 26-man active roster by a certain date. --normally, opt-out clauses are required for veterans who finish the previous season on a club's 40-man roster or injured list and are invited to big league camp as a non-roster invitee. how does this affect a player who finishes the season on a club's 60-man roster or injured list? --we don't know if or how long there will be a requisite stay for players sent down on optional assignment. normally, it'd be 15 days for pitchers, and 10 days for position players. seeing as there's no minor league club to report to on optional assignment, it seems unreasonable to expect a requisite stay--especially with a shortened season. --we don't know how optional assignments will work for the 20 additional players on the 60-man roster, and for that matter, for players who were on the 40-man roster when transactions froze. if they spend more than 20 days on optional assignment, do they burn an option? will clubs be granted an extra option year for players who were not rule 5 eligible in 2019? --expanding on that, the 40-man roster is a major league roster. players are signed to split contracts--they make a set amount when on the active club roster, and much less (but a negotiated amount) when on optional assignment. is the 60-man roster being defined as a major league roster? --how will outright waivers and release waivers be handled--especially for a player out of minor league options? can other clubs jump in to make a claim? if so, how? this is especially important if mlb and mlbpa decide to pare the major league roster size back towards 40 players. again, we need clarification on how the 60-man roster is defined. --we certainly hope it doesn't come to this, but what happens if a team's 60-man roster is decimated by the actual or potential spread of covid, and there are fewer than 26 healthy players available? *i removed content on postseason eligibility due to my misinterpretation.