There were times on Sunday that the fire in Stefon Diggs’ eyes looked like a warning of a coming eruption, the frustration on his face evident as the Vikings fell behind and he stormed up and down the sideline looking for someone to yell at.



And there were times that fire appeared to light a fuse in the Vikings offense that ignited a historic second-half comeback to beat the Broncos, Diggs’ screams turning to rallying cries as he exhorted the crowd, cheered the defense and celebrated with coaches during a 27-23 victory.



While most Vikings fans were riding a rollercoaster of emotions in the stands on Sunday, Diggs was going through the same thing on the sideline. He was so volcanic at one point that an injured Adam Thielen had to step in and try to cool him off. Later, during the comeback, he was the team’s biggest cheerleader.



All in a day’s work for a receiver that pushes the envelope in good ways and bad, and brings a skill set so...