If the Gold Glove at third base in the National League is Nolan Arenado's to lose, all the other candidates might as well change positions or find a new goal for the year. Arenado has done nothing but add highlight reel plays to his already impressive resume, and the work he's currently doing could easily cement him as the man to beat for years to come. For example, take Friday night's defensive exhibition in the Colorado's 6-4 win against the San Francisco Giants. At two key points in the game, Arenado stepped up to make exceptional defensive plays. The first saved Colorado at least one run, while getting them two outs. The second killed a rally before it could even get started, which helped Colorado hold on. [ Yahoo Sports Fantasy Baseball: Sign up and join a league today! ] Arenado's big defensive night started in the fourth inning. With runners at first and second, no outs and the game still tied, Casey McGehee hit a sharp one-hopper down the third-base line that seemed ticketed for the left-field corner. Arenado dived to his right, full extension, to flag the ball down, which alone was very impressive. He quickly got to his feet and without hesitation ran three steps to third...