Mistake-prone 49ers lose to Cardinals

[...] what's the locker-room vibe after the 49ers committed three turnovers that led to 17 points, allowed seven sacks and their 32nd-ranked run defense surrendered 157 yards and two touchdowns to running back David Johnson? The vibe in head coach Chip Kelly's postgame news conference was different after Gabbert tossed two interceptions deep in 49ers' territory that led to 10 points. Before Thursday, Kelly had slammed the door shut on talk of replacing Gabbert with backup Colin Kaepernick, but he said "we're going to look at everything" when asked if the position would be assessed before the 49ers visit Buffalo on Oct. 16. Gabbert completed 18 of 31 passes for 162 yards with a touchdown and posted a 56.1 passer rating. In the first quarter, he had near-comical overthrows intended for tight end Garrett Celek and wide receiver Rod Streater, who were both running free deep downfield. In the second half, the crowd chanted, "We wanted Kap," as the Cardinals scored 24 of the first 31 points after halftime to take 31-14 fourth-quarter lead. The Cardinals are the defending NFC West champions, but they entered with a 1-3 record and started journeyman backup quarterback Drew Stanton after...