Colorado native Kelsie O’Brien played in Women’s Elite Rugby during it’s inaugural season in 2025. She represented the Denver Onyx for her entire WER career.

Kelsie O’Brien earned her WER debut in Round 2 of the 2025 season, when she was named in the Denver Onyx starting lineup against the Bay Breakers, the first game in Onyx history. She has previously represented the Colorado Gray Wolves in the WPL, and has played with the USA team in numerous camps.

NARDB Player #1,491