Photos: USA Swimming's 2019 Phillips 66 National Championships

STANFORD, CA - JULY 31: Luca Urlando competes in the Men's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Ryan Held starts the Men's 100 LC Meter Freestyle A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Ryan Held celebrates his win in the Men's 100 LC Meter Freestyle A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Regan Smith prepares to swim in the Women's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Teammates of Wisconsin's Ally McHugh celebrate her win in the Women's 800 LC Meter Freestyle for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Swimmers compete in the Men's 100 LC Meter Freestyle B-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Regan Smith competes in the Women's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Swimmers start the Men's 200 LC Meter Butterfly for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Luca Urlando competes in the Men's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Abbey Weitzeil competes in the Women's 100 LC Meter Freestyle A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Regan Smith competes in the Women's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Children show signs in support of swimmers before the Women's 800 LC Meter Freestyle for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Ally McHugh competes in the Women's 800 LC Meter Freestyle for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Abbey Weitzeil competes in the Women's 100 LC Meter Freestyle A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Abbey Weitzeil waves as she is introduced before the Women's 100 LC Meter Freestyle A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Regan Smith, left, gets a hug from Lillie Nordmann, after Smith won the Women's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Regan Smith competes in the Women's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)
STANFORD, CA - JULY 31: Regan Smith receives her gold medal after winning the Women's 200 LC Meter Butterfly A-Final for the 2019 Phillips 66 National Championships at the Stanford Avery Aquatic Center at Stanford University in Stanford, Calif., on Wednesday, July 31, 2019. (Nhat V. Meyer/Bay Area News Group)

By Nhat V. Meyer | nmeyer@bayareanewsgroup.com | Bay Area News Group

PUBLISHED: July 31, 2019 at 8:02 p.m. | UPDATED: August 1, 2019 at 7:56 p.m.

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STANFORD – In a matter of hours two U.S. Open records fell in the same race, the Men’s 100 Meter Freestyle. On the first night of the 2019 Phillips 66 National Championships, the U.S. record for the Men’s 100 Meter was broken by Ryan Held with a time of 47.39. The previous record, held very shortly by Held in the preliminary round at 47.43, only lasted a few hours when he broke Jason Lezak’s record from 2008 at 47.58.

Regan Smith won the Women’s 200 Meter Butterfly at 2:07.26. Luca Urlando won the Men’s 200 Meter Butterfly at 1:54.92. Cal’s Abbey Weitzeil won the Women’s 100 Meter Freestyle at 53.18. Ally McHugh won the Women’s 800 Meter Freestyle at 8:26.04. Bobby Finke won the Men’s 1500 Meter Freestyle at 14:51.15.