Has there ever been a 11–3 in all competitions?

Yes, 2 times.

The first time: October 2, 1960, Racing Club beat Rosario Central (Racing Club 11–3 Rosario Central) · Primera Argentina.

The last time: June 18, 1972, León beat Torreón (León 11–3 Torreón) · Liga MX, 54 years ago.

Home wins: 2. Away wins: 0.

Nearby scores

1. 12–2 1 time
2. 12–3 Never
3. 12–4 Never
4. 11–2 3 times
5. 11–3 2 times
6. 11–4 Never
7. 10–2 7 times
8. 10–3 6 times
9. 10–4 3 times

All games

1. June 18, 1972 León 11–3 Torreón · Liga MX
2. October 2, 1960 Racing Club 11–3 Rosario Central · Primera Argentina