"Defensively, we've seen flashes of great plays this year and we've seen him make the routine play. At other times, we've seen him not make that play that should be made," said Padres manager Bud Black. "Yesterday, I wouldn't classify them as routine but they were makeable for a shortstop.
"He'll be the first to admit that."
Cabrera booted Alcides Escobar's ground ball two batters into the contest, and then had trouble digging Alex Gordon's ground ball out of his glove -- and followed by dropping it -- three batters later, the team was down 3-0 after one inning.
"I feel bad," Cabrera said afterward.
Cabrera's first error moved Nori Aoki to second base following his leadoff single and set up Eric Hosmer's two-run single. Cabrera's second error moved Hosmer to third and put Gordon on first, setting up Danny Valencia's RBI single.
"It's just the concentration," said Padres third-base coach Glenn Hoffman, who works with the team's infielders. "He made the mistake with the transfer with the glove, and that's something he has actually been pretty good at.
"Being a shortstop, you're always going to get a lot of action."
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.