49ers start poorly in sloppy preseason win over Chiefs

The 49ers kicked off the Kyle Shanahan era by initially getting kicked in the teeth Friday night in a 27-17 win over the Chiefs at Arrowhead Stadium. Cornerback Rashard Robinson was burned for a 32-yard completion to set the stage for a 75-yard touchdown drive that ended seven plays later. The totals: zero first downs, three yards, an illegal-formation penalty and a forgettable stat line (1 of 4, 3 yards) for quarterback Brian Hoyer. Oh, right, it got even worse for a team coming off a 2-14 season: defensive tackle DeForest Buckner left the game on the first drive and was immediately declared out. In the second quarter, the 49ers had an eight-yard touchdown pass from Matt Barkley to Aldrick Robinson wiped out by penalty. On Friday, Robinson, a 2016 fourth-round pick, didn't look up to the task of being the leading man. [...] he was beaten badly down the right sideline by wide receiver Tyreek Hill on the game's first play for the 32-yard gain. Six plays later, he whiffed on an open-field, third-down tackle that would have prevented a first down. Robinson's nightmare was finally interrupted when he intercepted a short pass floated by Tyler Bray, who threw the errant ball when he was...