Haley Lanier Berg (born September 23, 1998) is an American professional soccer player who plays as a midfielder for Dallas Trinity FC in the USL Super League.

[8] She made her club debut on April 17, 2023 in the final of the Icelandic Women's Football Super Cup against Stjarnan where Valur lost on penalties.

Berg scored her first goal with the club on May 21, 2023 in a 1-2 loss to Knattspyrnufélagið Þróttur in the Icelandic Women's Football Cup.

[8][9][10] Berg joined Dallas Trinity in June 2024, ahead of the inaugural USL Super League season, becoming the team's 3rd signing overall.

[11] Berg made her debut for the club on August 18, 2024 as a second half substitute for Samantha Meza during Dallas's inaugural match against Tampa Bay.