San Francisco 49ers linebacker De’Vondre Campbell refused to enter Thursday’s game against the Rams, according to head coach Kyle Shanahan. Campbell was spotted heading into the locker room during the third quarter of the 12-6 home loss. When reporters asked Shanahan about this, he replied, “He said he didn’t want to play today.”The coach clarified that this conversation happened in the third quarter, when Campbell was asked to come in for Dre Greenlaw, who was dealing with Achilles fatigue and subbed out of the game. Shanahan added that this was the first time in his career that a player had...