There was no evidence that Woods, 45, was impaired or that he had consumed drugs or alcohol at the time of the accident.
Along with injuries, the 45-year-old has survived several scandals throughout his career including a 2017 arrest on a charge of driving under the influence of alcohol or drugs.
Video footage from the crash scene showed Woods' dark gray Genesis sport utility vehicle badly crumpled and lying on its side near the bottom of the hillside, its windows smashed.
American Johnson led throughout, though only by one stroke early, and did not drop a shot in the final 13 holes on his way to a four-under-par 68 and an unprecedented 20-under-par 268 total.
Borruso, who is seeking more than $30,000 in damages, says he stumbled and fell into the crowd of spectators after being shoved by LaCava, ultimately causing injuries he described in the lawsuit as 'permanent or continuing.'
Golf returned to the Games in 2016 after a 112-year absence, but Woods, who dominated the sport in the first decade of the 21st century, missed its return through injury.
With 81 PGA Tour victories, Woods is one shy of Sam Snead's all-time record, and with 15 major tournament victories, he trails only Nicklaus, who has 18.
The US President joined the duo at his property, the rump National Golf Club in Jupiter, Florida.
The win preserved Woods's perfect record of never having lost after leading by three shots or more going into the final round, a record he extended to 24-for-24.