BETHESDA, Md. -- Earlier this year, Roberto Castro opened with a 63 at THE PLAYERS Championship only to suffer a 15-stroke fade the following day.
There was no such swoon Friday at the AT&T National. Castro shot a 69 to enter the weekend 7 under and with a share of the early lead with Jordan Spieth.
Spieth shot 66.
"I probably learned a lot (at THE PLAYERS) and realized that one round doesn't mean anything," Castro said. "Just got to keep going. I was able to do that today."
On another difficult day of scoring, Castro managed three birdies and for a second straight day just one bogey.
"It feels good to play two rounds under par," Castro continued. "It's a very hard golf course."
Spieth made it look easy at times.
The 19-year-old former University of Texas standout made five birdies through his first nine holes, going out in 31.
On the back nine, he didn't make any birdies. But he didn't make any bogeys, either. And one of his birdie attempts circled the hole on No. 12 before lipping out.
He also hit all 18 greens in regulation, even though he missed five fairways.
Spieth, playing on a sponsor exemption and with special temporary membership, has made the most of his limited schedule.
In 13 starts, Spieth has finished in the top 10 four times, including a runner-up in Puerto Rico. Should he go on to win, he would lockup his card for the next two years and become eligible for the FedExCup playoffs.