Jennings didn't play in Sunday's 16-10 preseason win over the Saints due to an oblique injury, Matt Maiocco of NBC Sports Bay Area reports.
Maiocco adds that Jennings isn't expected to miss much time due to the injury. While Jenning's status for the 49ers' preseason finale against the Raiders on Friday is uncertain, he doesn't seem to be in jeopardy of missing the Sept. 9 regular-season opener against the Jets.