Projected 2021 season finishes for Japan’s Central and Pacific Leagues after the games of Sept. 19, 2021.
Central League projected finishes
| p W | p L | T | p Win Pct | p GB | |
| Swallows | 73 | 56 | 14 | .5659 | |
| Tigers | 77 | 61 | 5 | .5580 | 0.5 |
| Giants | 69 | 58 | 16 | .5433 | 3.0 |
| Dragons | 59 | 70 | 14 | .4574 | 14.0 |
| BayStars | 58 | 71 | 14 | .4496 | 15.0 |
| Carp | 57 | 76 | 10 | .4286 | 18.0 |
Pacific League projected finishes
| p W | p L | T | p Win Pct | p GB | |
| Marines | 72 | 54 | 17 | .5714 | 0.0 |
| Buffaloes | 69 | 59 | 15 | .5391 | 4.0 |
| Eagles | 67 | 63 | 13 | .5154 | 7.0 |
| Hawks | 62 | 62 | 19 | .5000 | 9.0 |
| Lions | 55 | 70 | 18 | .4400 | 16.5 |
| Fighters | 54 | 72 | 17 | .4286 | 18.0 |
The projections are based on each team’s existing records, runs scored, runs allowed, and games remaining. Each league’s remaining wins and losses are distributed based on the teams’ relative Pythagorean winning percentages. Future ties are not considered, nor are the number of home and road games remaining or the apparent quality of remaining opponents.
