SANTA CLARA – Linebacker Fred Warner, sporting a red welt above his right eye and familiar heartache inside his black jacket, knew just how to summarize the 49ers’ feelings after Sunday’s 20-17 loss to the Seattle Seahawks.
“It’s just infuriating, honestly,” Warner said.
“That’s a good word,” running back Christian McCaffrey said.
It was the 49ers’ third defeat this season via a fourth-quarter collapse, the others also coming against NFC West opponents — at the Los Angeles Rams in Week 3...