McLaren
John Watson finished P9 in the 1979 World Drivers' Championship with 15 points. Across 15 races: 0 wins, 1 podium and 0 pole positions, with a best finish of P3.
| Round | Race | Team | Grid | Finish | Points | Status |
|---|---|---|---|---|---|---|
| 1 | Argentine Grand Prix | McLaren | 6 | P3 | 4 | Finished |
| 2 | Brazilian Grand Prix | McLaren | 14 | P8 | +1 Lap | |
| 3 | South African Grand Prix | McLaren | 14 | P17 | Ignition | |
| 4 | United States Grand Prix West | McLaren | 18 | P13 | Injection | |
| 5 | Spanish Grand Prix | McLaren | 18 |
| P22 |
| Engine |
| 6 | Belgian Grand Prix | McLaren | 19 | P6 | 1 | Finished |
| 7 | Monaco Grand Prix | McLaren | 14 | P4 | 3 | Finished |
| 8 | French Grand Prix | McLaren | 15 | P11 | +2 Laps |
| 9 | British Grand Prix | McLaren | 7 | P4 | 3 | +1 Lap |
| 10 | German Grand Prix | McLaren | 12 | P5 | 2 | Finished |
| 11 | Austrian Grand Prix | McLaren | 16 | P9 | +1 Lap |
| 12 | Dutch Grand Prix | McLaren | 12 | P13 | Engine |
| 13 | Italian Grand Prix | McLaren | 19 | P21 | Accident |
| 14 | Canadian Grand Prix | McLaren | 17 | P6 | 1 | +2 Laps |
| 15 | United States Grand Prix | McLaren | 13 | P6 | 1 | +1 Lap |