Pettis (knee) was a full participant during Thursday's practice, Keiana Martin of the 49ers' official site reports.
Pettis suffered the knee injury in Week 4, but as evidenced by this news, the issue isn't serious enough to force him to miss game action. Now that Pettis appears fully healthy, look for him to assume his usual depth role, one that has rendered him a fantasy non-factor thus far this season.