"Nolan's swinging the bat really well," Weiss said of Arenado, who doubled in his first at-bat on Sunday against the Cardinals. "The average doesn't necessarily say that, but he's barreled up a lot of balls that have been outs. He's handled himself really well.
"You keep your eye on guys, particularly young guys. If they start to get beat up a little bit, that's when I'll give them a day. But for me, he's playing a helluva third base and he's putting together a lot of very good at-bats."
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.