Sunday’s highlights: It happens at least one per practice and it happened again on the second full day of padded workouts when Murray tucked the ball and sprinted down the left sideline for a 30-plus-yard gain. The speed and quickness was unreal. So was his designed scramble up the gut with running backs David Johnson and Chase Edmonds lined up on either side of him. Murray also showed maneuverability, dancing in and out of the pocket on several throws. … One thing to watch for with Murray is potential fumbles, considering the number of times he’ll be operating out of the shotgun. He’s never really been known as a fumbler, but he dropped one on Sunday and has had a few shaky snap and handoff exchanges. … In what seems to be becoming a trend, Murray has found some great synergy with fellow rookie KeeSean Johnson. The wide receiver from Fresno State was a frequent target of Murray, particularly on underneath, crossing routes. “He’s picked up the system really really quickly,” coach Kliff Kingsbury said of Johnson. “He’s a smooth route runner; we knew that coming out. We knew he was one of the top two pure route runners in the draft and it shows. I mean, he can get in and out of breaks. Great hands, competitive catches as you’ve seen throughout the first couple of days. He’s got to keep working, got to get stronger, got to continue to hone his craft, but you know, he’s a football player and he’s off to a solid start.”