The US-born Italian broke through big last year with his gold medal after 9.80, but this season he has had major problems with injuries and withdrew from several competitions.
He has not been under ten seconds this season.
- It was a painful decision but I had to quit.
"I'm a fighter and that's why I'm in Eugene at all," Jacobs told Reuters.
In a couple of weeks, the European Championships in Munich and several Diamond League galas await.
- I do not want to endanger the rest of the season by risking a more serious injury and I have to cancel the competition.
I promise I will make you dream, says the Italian.