But Adams' foot came off the base as he made the catch, and, though video replay appeared to show him recovering in time to touch the base on the second try before Byrd, the replay umpire determined that there was not enough evidence to change first-base umpire Larry Vanover's call.
"I'm at a loss," Matheny said after the Cardinals' 5-1 loss. "I believe the system is right. I believe the system is trying to push technology forward in a way that could be useful for us. But it has frustrated us more than anything at this point because things that we're seeing, I guess, are not being seen at the office back in New York. It has helped us very little and hurt us a lot."
A change in call would have ended the seventh. Instead, lefty Sam Freeman had to face one more batter, whom he eventually retired on a groundout to keep the score at 5-1.
Matheny is now 2-8 with his challenges this season.
"There is a lot of data out there right now that is showing that it's not helping us," Matheny said. "We're trying to be as aggressive as we can and try to use the system to our advantage. It's not working."
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.