Getty Head coach Kyle Shanahan of the San Francisco 49ers. The San Francisco 49ers enter Week 5 significantly shorthanded at wide receiver. The team will hit Thursday Night Football Week 5 against the rival Los Angeles Rams with very little margin for error. Excluding top wideout Brandon Aiyuk , who’s currently on IR, the Niners are without Jauan Jennings (ankle/rib), Ricky Pearsall (knee/PCL) and Jordan Watkins (calf). All have been ruled out for Week 5. Quarterback Brock Purdy has also been