SAN MARTIN -- The choice for Bay Area sports fans Thursday didn't have to come down to either golf or baseball.

Just ask Ren and Jo DelCarlo of Mountain View, retirees who bought tickets to the opening round of the Frys.com Open before anybody knew that the Giants and Cincinnati Reds would be squaring off in the deciding game of their National League Divisional playoff series.

The DelCarlos were pleasantly surprised to be able to park themselves in front of a flat-screen TV set up at a concession stand constructed between the 13th and 18th fairways, where top pros such as Ernie Els and Vijay Singh were competing.

And when Buster Posey mashed the home run that ultimately led San Francisco to a 6-4 victory, the DelCarlos were in place to enjoy it.

"You can't ask for a better day," Ren DelCarlo said. "Golf and watching Buster Posey hit a grand slam."

Tournament officials, who had been expecting 60,000 to walk the CordeValle Golf Club course this week, looked at it a little differently. Frys.com Open president Duke Butler did not have an attendance figure, but he acknowledged Thursday's turnout did not meet expectations.

The reasons, he said, went beyond baseball.

Weather didn't help. Temperatures that barely climbed out of the 50s and a steady rain that arrived midafternoon made it seem more like San Francisco on a bad day than the usually warm hills about 30 miles south of San Jose.

Butler cited the scheduled tee times for top players as another drawback.

"Some of the more glamorous players played in the morning today and it's a little more difficult for fans to come out than in the afternoon," Butler said, adding that the big names will be playing after noon on Friday.

This is the third time the Frys.com Open, which has 132 golf pros competing for $5 million in prize money, has come to CordeValle. While 35,000 fans turned out in 2010, about 75,000 showed up last year with Tiger Woods as the big draw.

Without Woods, that figure was expected to drop and the question was just how far. The crowd Thursday was so thin that the course marshals lifting their "silence" paddles didn't seem needed as there were few around to make any noise.

The DelCarlos weren't alone when it came to following both the golfers and their favorite baseball team.

Bartender Ron Huerta and two friends drove up from Gilroy, then parked themselves near a TV at the Lion's Peak Grill to catch the Giants win. "Nothing wrong with watching a little golf, either," he said, making his priorities clear.

Fans weren't the only ones positioned for a little sports multitasking. Jarrod Tilbury of Hole-in-One Catering could grill burgers and occasionally look over his shoulder to chart the game's progress.

"It's not bad. You've got to make sure you pay attention to the customers first, of course, but I can take a glance back every once in a while and check the score," said Tilbury, who passed those scores along to customers.

And while the golfers themselves may not have been caught up in the game while still on the course, they, too, wanted to know what was going on in Cincinnati and elsewhere.

Jhonattan Vegas, whose 65 on opening day made him the early leader in the clubhouse, said he didn't hear the cheering from fans when Posey hit his grand slam.

"No, to be honest, I didn't notice. I was just focused on playing," he said. "But I wish they would have told me."

Vegas, a native of Venezuela who played baseball as a child, said he has gotten to know major leaguers from his native country, including Pablo Sandoval and Marco Scutaro of the Giants. Vegas said he and Detroit Tigers slugger Miguel Cabrera are also good friends and that a drive to Oakland for Thursday night's deciding game was not out of the question.

"But that's a lot," he said, realizing there was still the matter of a golf tournament to win.