The Mercedes driver collided with former team-mate Lewis Hamilton, who incurred a five-second penalty for the incident.
The hometown hero began his final round of The Open with a spectacular birdie at the first hole.
Argentina were denied a try that, if converted, would have snatched a draw deep into overtime.
Sobers made 93 Test appearances for the Windies across 20 years.
Last year’s winner as King George Stakes in his sights once more.