SAN FRANCISCO —The sun in right field was there for all of one inning, but the bright natural light was there long enough to affect Diamondbacks outfielder Jake McCarthy's tracking of San Francisco Giants third baseman David Villar's sinking fly ball in the bottom of the first.
Only the sun wasn't much of, if at all, a factor in the play.
McCarthy hesitated as he approached the ball, then stumbled on the grass. The ball that could have been the third out of the inning dropped for a triple, and Villar raced home on an errant relay throw from second baseman Sergio Alcántara.
The Giants scored three runs on the play, four in the inning against Diamondbacks starter Dallas Keuchel, and Arizona ended up losing 13-0 Tuesday night at Oracle Park.
"I just got a decent read on it, was playing the sun a little bit, stepped back, foot slipped. Ball should be caught," McCarthy said after the game. "Dallas is out there battling, you know, just a ball dropped that shouldn't drop ever. So that's just on me."
Diamondbacks manager Torey Lovullo called the play a "gut punch" but one the team needs to learn how to recover from.
"He said it had nothing to do with the sun. It's just he went to make a break on the ball and just slipped. So those are things we've got to eliminate," Lovullo said. "I know slippage happens in this game. But you know, being under control and making good reads ... is part of who we are."
The Giants added four more runs against Keuchel, on a two-run home run and a pair of solo shots, and coasted to their second win over the Diamondbacks in five meetings this season.
Keuchel couldn't regroup after the McCarthy missed catch in right field, and was charged with seven earned runs on eight hits over 2⅓ innings. Keuchel (2-7) arrived to the Diamondbacks on a minor-league contract last month with a 7.88 earned run average after eight starts with the Chicago White Sox. It's up to 8.53 after four starts with Arizona.
"There's some tough luck involved but as a starting pitcher, I've got to be a little bit better," Keuchel said. "Haven't really had a great first inning now in my fourth start so I was really trying to get that one under my belt, obviously that didn't go well. It was either pretty much a strikeout or base hit somewhere or a home run."
The Diamondbacks' 13-run loss was tied for their most lopsided defeat of the season, and it saw catcher Carson Kelly pitch in the bottom of the eighth inning. Kelly gave up three runs on three hits in his second outing of the season on the mound.
The Diamondbacks (39-49) got three hits from Alcántara, 2⅔ innings of scoreless relief from right-hander Edwin Uceta and an inning of scoreless relief from right-hander Luke Weaver, who has worked four straight outings without allowing a run.
Those were the only bright spots in losing their fifth game in the past seven.
"A lot of credit goes to him. He made pitches," Lovullo said of Uceta. "We extended him probably as far as we could and he didn't let it hinder him, he went out and attacked the zone."
The Giants sent outfielder Luis Gonzalez, who grew up in Tucson, to pitch the top of the ninth inning. Gonzalez had pitched 4⅓ innings this season going into Tuesday, and he tossed a scoreless inning with two hits allowed.
This article originally appeared on Arizona Republic: Arizona Diamondbacks blown out by San Francisco Giants