Mike Iupati’s concussion will keep him out Sunday

The 49ers are going to Denver without one of their best offensive players Sunday night. According to Matt Maiocco of CSNBayArea.com, 49ers coach Jim Harbaugh said guard Mike Iupati was still experiencing concussion symptoms, and wouldn’t be ready to play against the Broncos. That likely pushes Joe Looney into the starting lineup. He started the…