The people at www.sportsbettingdime.com give Major League Baseball the best chance of returning to action first:

Odds to be the first North American sport to play a regular-season or playoff game

1. MLB: 1/1
2. NHL: 7/2
3. NBA: 9/2
4. MLS: 19/1
5. CFB: 32/1
6. NFL: 100/1

Over/Under date for each pro sport to play its first regular-season or playoff game

1. MLB: July 15
2. NHL: July 31
3. NBA: Aug. 2
4. MLS: Aug. 30
5. NFL: Sep. 10

Odds a 2020 champion is not crowned in the following sports

1. MLS: 6/5
2. NBA: 4/3
3. MLB: 3/2
4. NHL: 3/2
5. NFL: 15/1

OVER/UNDER MLB regular-season games played: 79.5

OVER/UNDER total MLB players who opt to sit out the season: 19.5

Odds 2020 MLB Season is canceled/never begins: 8/5

Over/Under Date of 2020 World Series Game 1: Nov. 15