[8] On January 16, 2020, Weaver was selected as the second overall pick in the 2020 NWSL College Draft by the Portland Thorns FC.

[9] She made her professional debut for Portland Thorns FC on June 27, 2020, in the 2020 NWSL Challenge Cup, coming on as a substitute in the 54th minute for Tyler Lussi against North Carolina Courage.

[13][14] In the 2022 regular season, Weaver made 20 appearances (13 starts) and tallied the second-most goals on the team (7) with three assists.

[17] Weaver returned to the pitch on Sept 13, 2024 as a substitute in the 66th minute of a 0-1 loss to Chicago Red Stars at Providence Park.

[18] Coinciding with her return from injury, the Thorns announced that Weaver had signed a contract extension with the club through 2028.