Silver linings are tough to find during a Rockies season clouded by mounting losses. But last Tuesday night, in an 8-5 loss to Arizona at Coors Field, four highlight-reel moments captured the talents of rookie outfielders Brenton Doyle and Nolan Jones. The quartet of plays also served as a reminder that speedy, athletic players are essential to a Rockies rebuild. Think of them as Colorado’s guardian angels in the outfield. The plays: • In the first inning, Christian Walker smashed a ball 413 feet to center field only to see Doyle make the catch before he collided with the wall.