Xavier Arreaga and Brad Smith scored second-half goals and the MLS-leading Seattle Sounders beat Los Angeles FC 2-0 on Sunday night.

Arreaga opened the scoring in the 57th minute, redirecting João Paulo’s corner with a header inside the right post. It was Arreaga’s first career goal with the Sounders (5-0-1).

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Seattle Sounders' Will Bruin (17) and Brad Smith (11) react as Los Angeles FC forward Latif Blessing (7) looks on after Smith scored a goal on LAFC goalkeeper Pablo Sisniega, left, during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Xavier Arreaga and Brad Smith scored second-half goals and the MLS-leading Seattle Sounders beat Los Angeles FC 2-0 on Sunday night.

Seattle Sounders defender Brad Smith, left, celebrates with defender Xavier Arreaga after Arreaga scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. Smith also scored and the Sounders won 2-0. (AP PhotoTed S. Warren)

Smith was off target on the best scoring opportunity of the first half, spraying a wide-open shot left of the goal from 12 yards out.

Seattle Sounders defender Brad Smith, second from right, celebrates with midfielder Alex Roldan, right, after Smith scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The Sounders won 2-0.(AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, second from right, celebrates with midfielder Alex Roldan, right, after Smith scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The Sounders won 2-0.(AP PhotoTed S. Warren)

Seattle Sounders defender Xavier Arreaga celebrates after scoring a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The goal was Arreaga's first career MLS goal. (AP PhotoTed S. Warren)

Seattle Sounders defender Xavier Arreaga celebrates after scoring a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The goal was Arreaga's first career MLS goal. (AP PhotoTed S. Warren)

Seattle Sounders midfielder Alex Roldan, left, tries to block a kick by Los Angeles FC defender Marco Farfan, right, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders midfielder Alex Roldan, left, tries to block a kick by Los Angeles FC defender Marco Farfan, right, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, left, battles with Los Angeles FC forward Latif Blessing, right, for the ball, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, left, battles with Los Angeles FC forward Latif Blessing, right, for the ball, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC midfielder Mark-Anthony Kaye heads the ball during the first half of an MLS soccer match against the Seattle Sounders, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC midfielder Mark-Anthony Kaye heads the ball during the first half of an MLS soccer match against the Seattle Sounders, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC forward Diego Rossi eyes the ball as Seattle Sounders midfielder Joao Paulo (6) kicks it away after Rossi fell during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC forward Diego Rossi eyes the ball as Seattle Sounders midfielder Joao Paulo (6) kicks it away after Rossi fell during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders goalkeeper Stefan Cleveland, second from left, leaps to grab the ball during the first half of an MLS soccer match against Los Angeles FC, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders goalkeeper Stefan Cleveland, second from left, leaps to grab the ball during the first half of an MLS soccer match against Los Angeles FC, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Carlos Vela, the 2019 MLS MVP, made his second appearance of the season, entering as a substitute in the 70th minute and giving the LAFC (1-2-2) side a potential boost for a tying goal. But Smith made it 2-0 for Seattle three minutes later, heading home Alex Roldan’s cross.

Seattle Sounders' Will Bruin (17) and Brad Smith (11) react as Los Angeles FC forward Latif Blessing (7) looks on after Smith scored a goal on LAFC goalkeeper Pablo Sisniega, left, during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders' Will Bruin (17) and Brad Smith (11) react as Los Angeles FC forward Latif Blessing (7) looks on after Smith scored a goal on LAFC goalkeeper Pablo Sisniega, left, during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Smith was off target on the best scoring opportunity of the first half, spraying a wide-open shot left of the goal from 12 yards out.

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Seattle Sounders defender Brad Smith, left, celebrates with defender Xavier Arreaga after Arreaga scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. Smith also scored and the Sounders won 2-0. (AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, left, celebrates with defender Xavier Arreaga after Arreaga scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. Smith also scored and the Sounders won 2-0. (AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, second from right, celebrates with midfielder Alex Roldan, right, after Smith scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The Sounders won 2-0.(AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, second from right, celebrates with midfielder Alex Roldan, right, after Smith scored a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The Sounders won 2-0.(AP PhotoTed S. Warren)

Seattle Sounders defender Xavier Arreaga celebrates after scoring a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The goal was Arreaga's first career MLS goal. (AP PhotoTed S. Warren)

Seattle Sounders defender Xavier Arreaga celebrates after scoring a goal against Los Angeles FC during the second half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. The goal was Arreaga's first career MLS goal. (AP PhotoTed S. Warren)

Seattle Sounders midfielder Alex Roldan, left, tries to block a kick by Los Angeles FC defender Marco Farfan, right, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders midfielder Alex Roldan, left, tries to block a kick by Los Angeles FC defender Marco Farfan, right, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, left, battles with Los Angeles FC forward Latif Blessing, right, for the ball, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders defender Brad Smith, left, battles with Los Angeles FC forward Latif Blessing, right, for the ball, during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC midfielder Mark-Anthony Kaye heads the ball during the first half of an MLS soccer match against the Seattle Sounders, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC midfielder Mark-Anthony Kaye heads the ball during the first half of an MLS soccer match against the Seattle Sounders, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC forward Diego Rossi eyes the ball as Seattle Sounders midfielder Joao Paulo (6) kicks it away after Rossi fell during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Los Angeles FC forward Diego Rossi eyes the ball as Seattle Sounders midfielder Joao Paulo (6) kicks it away after Rossi fell during the first half of an MLS soccer match, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders goalkeeper Stefan Cleveland, second from left, leaps to grab the ball during the first half of an MLS soccer match against Los Angeles FC, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)

Seattle Sounders goalkeeper Stefan Cleveland, second from left, leaps to grab the ball during the first half of an MLS soccer match against Los Angeles FC, Sunday, May 16, 2021, in Seattle. (AP PhotoTed S. Warren)