The 49ers plan to place Kittle (calf) on IR, Tom Pelissero of NFL Network reports.
Once the move is made official, Kittle, who had been listed as doubtful for Sunday's game against the Cardinals, will be destined for a three-game absence, which would keep him sidelined through Week 8 since the 49ers have a bye during that time. In the meantime, Ross Dwelley and Charlie Woerner are slated to head the 49ers' tight end corps.