SANTA CLARA — Running back Jerick McKinnon experienced another setback with his reconstructed right knee and his 49ers future is up in the air, general manager John Lynch said Wednesday on KNBR 680-AM.
If McKinnon’s comeback is stalled again, the 49ers could put him on injured reserve, as was the case a year ago when he tore his anterior cruciate ligament eight days before the season opener. For him to be eligible to return as a short-term, injured reserve candidate, he’d first have to make the initial 53-man roster Saturday.