John Lynch: RB Jerick McKinnon suffered setback

San Francisco 49ers running back Jerick McKinnon is having a difficult time in his bid to rehab the season-ending ACL injury he suffered last year.

According to Tom Pelissero of NFL Network, McKinnon suffered a “flare-up,” and 49ers general manager John Lynch described it was “not encouraging.”

#49ers RB Jerick McKinnon had what one source described as a “flare-up” yesterday in his surgically repaired knee. Team now gathering more information before deciding next steps. Per @knbrmurph, GM John Lynch said on radio the setback was “not encouraging.”

— Tom Pelissero (@TomPelissero) August 28, 2019

In short, it does not sound like McKinnon will be ready for Week 1. It has been nearly a year since he originally suffered the injury, but he doesn’t seem to be on the verge of playing again.

The 27-year-old McKinnon last played in 2017 with the Minnesota Vikings, where he rushed for 570 yards and three touchdowns in a supplementary role.