Current timetables for the major sports leagues in the USA:

• NFL:  Will not delay "league year" operations, but the annual league meeting for about three weeks from now is off.
• MLB:  Spring Training terminated today, Opening Day is pushed back at least two weeks.
• NBA:  At least 30 days.  The owners have just announced they want that timeframe to re-evaluate.  There is discussion of arena availability in July or even AUGUST (which would basically kill the Olympic situation -- though there's no way I can see the Olympics going on, especially with some of these timetables here in the States.
• NCAA:  All sports championships cancelled for the rest of what would be the 2019-20 school year (At least June).
• NHL:  No known timetable.  They pulled the plug today with about three and a half weeks to go before the playoffs.
• International Tennis:  Off for at least six weeks.
• MLS:  At least 30 days.
• NASCAR:  Will attempt to continue to race without fans.  Cancelled what they wanted to attempt on Friday.
• PGA:  Will attempt to go on with the schedule without fans.  Cancelled this weekend and the next three after an attempt at a first round today.
• XFL:  Season cancelled.  Players will be paid.
• US Soccer: All international friendlies are off at least through April 14.  The CONCACAF Champions' League has shut down.

Will be updated, may be pushed, as conditions warrant.