"I'm not going to say, 'Well, that wasn't a big play, I'm not going to challenge it,'" Weiss said. "You've got to simplify it and say, 'I think they got it wrong, and I'm going to challenge it.' How do you know that it's not a big play, if there are two outs and nobody on and it won't lead to a big inning?'"
Weiss said he would lean heavily on advice from whoever is monitoring the video. Weiss rarely opposed calls and was not ejected from a game last season, and he does not claim to be able to tell if an umpire erred from his vantage point.
"It's really hard for me to tell from the dugout," Weiss said. "I bet 75 percent of the time I have no idea if he's out or safe. You've got people in your way. You're far away from the play. So a guy watching the slow-motion replay is going to have much more."
• Rockies center fielder Drew Stubbs missed the first two Cactus League games with an esophagus condition, but he had a couple of high points in his debut against the Brewers on Sunday.
Stubbs, hoping to reverse his troubles against right-handed pitching, led off the first by pushing Brewers starter Matt Garza to a full count before lining a single into left field. Stubbs also dashed to deep center to field Jason Rogers' fly ball in the second.
• In the first inning, the Brewers' Khris Davis hit a bouncer deep into the left-side hole that Rockies shortstop Troy Tulowitzki fielded before unleashing the across-the-body throw that is his trademark. Last year, coming off groin problems in 2012, making such a play this early in the spring would have been ill-advised for Tulowitzki.
• Matt McBride, who spent last season at Triple-A Colorado Springs playing mostly catcher, tripled, and had a leaping catch of a Kevin Mattison fly ball against the wall while playing right field.
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.