| Administrator: | Test and County Cricket Board |
| Cricket Format: | Limited overs cricket(40 overs per innings) |
| Tournament Format: | League |
| Champions: | Lancashire |
| Count: | 2 |
| Participants: | 17 |
| Matches: | 136 |
| Most Runs: | 625 Harry Pilling (Lancashire) |
| Most Wickets: | 32 Bob Woolmer (Kent) |
| Previous Year: | 1969 |
| Previous Tournament: | 1969 Player's County League |
| Next Year: | 1971 |
| Next Tournament: | 1971 John Player League |
The 1970 John Player League was the second competing of what was generally known as the Sunday League. The competition was won for the second consecutive year by Lancashire County Cricket Club.
| width=200 | Team | width=20 | Pld | width=20 | W | width=20 | L | width=20 | N/R | width=20 | A | width=20 | Pts | width=60 | R/R |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lancashire (C) | 16 | 13 | 2 | 1 | 0 | 53 | 5.14 | ||||||||
| 16 | 12 | 4 | 0 | 0 | 48 | 4.78 | |||||||||
| 16 | 11 | 5 | 0 | 0 | 44 | 4.42 | |||||||||
| 16 | 8 | 5 | 2 | 1 | 35 | 4.52 | |||||||||
| 16 | 8 | 6 | 1 | 1 | 34 | 4.43 | |||||||||
| 16 | 8 | 7 | 1 | 0 | 33 | 4.15 | |||||||||
| 16 | 7 | 7 | 0 | 2 | 30 | 4.59 | |||||||||
| 16 | 7 | 7 | 0 | 2 | 30 | 4.34 | |||||||||
| 16 | 7 | 7 | 2 | 0 | 30 | 4.16 | |||||||||
| 16 | 7 | 9 | 0 | 0 | 28 | 4.04 | |||||||||
| 16 | 6 | 8 | 1 | 1 | 26 | 4.44 | |||||||||
| 16 | 6 | 10 | 0 | 0 | 24 | 4.64 | |||||||||
| 16 | 6 | 10 | 0 | 0 | 24 | 4.18 | |||||||||
| 16 | 5 | 9 | 2 | 0 | 22 | 4.2 | |||||||||
| 16 | 5 | 9 | 1 | 1 | 22 | 4.1 | |||||||||
| 16 | 5 | 9 | 0 | 2 | 22 | 3.85 | |||||||||
| 16 | 3 | 10 | 1 | 2 | 15 | 4.3 | |||||||||
| Team marked | |||||||||||||||