Career Accolades

  • Pac-12 Champion (2021)
  • Two-time Pac-12 Tournament champion (2018, 2021)
  • IWLCA Academic Honor Roll (2021)
  • Two-time Pac-12 Academic Honor Roll (2020, 2021)
  • Pac-12 All-Academic honorable mention (2019)

As a Senior (2021) • Pac-12 Champions, Pac-12 Tournament Champions

  • IWLCA Academic Honor Roll
  • Pac-12 Academic Honor Roll 
  • Played in and started 10 games
  • Tied for third on the team with eight caused turnovers
  • Tied for fifth on the team with 18 ground balls

As a Junior (2020)

  • Pac-12 Academic Honor Roll 
  • Played and started all seven games
  • Totaled 10 ground balls and three caused turnovers
  • Season-high three ground balls against No. USC (March 6)

As a Sophomore (2019)

  • Pac-12 All-Academic honorable mention
  • Played and started all 19 games
  • Totaled 19 ground balls, 10 caused turnovers and two draw controls 
  • Season-high four ground balls in win over Fresno State (Feb. 21)
  • One ground ball and one caused turnover in NCAA Tournament against No. 7 Notre Dame (May 10)

As a Freshman (2018) Pac-12 Tournament Champions

  • Played in 16 games and started seven
  • Totaled six ground balls, four caused turnovers and three draw controls
  • Season-high two draw controls in win over Harvard (Feb. 23)
  • Season-high two caused turnovers against Colorado (April 13) 

Prior to Stanford

  • 2017 US Lacrosse All-American 
  • 2017 first-team all-group
  • Two-time second-team all-group (2015, 2016)
  • Three-time first-team all-county (2015, 2016, 2017)
  • Three-time first-team all-league (2015, 2016, 2017)
  • Most Improved Attacker for Ridgewood Girls Lacrosse (2015)
  • 2016 US Lacrosse Academic All-American 
  • 2015 Under Armour Underclassman All-American New Jersey
  • All-USA Girls Lacrosse second team
  • Served as captain as a senior
  • Four-time county champions
  • Two-time group state champions (2015, 2016)
  • Three-time group sectional champions (2015, 2016, 2017)
  • Also played varsity basketball

Personal

  • Daughter of Joanne and Matthew Trattner
    • Father wrestled for LIU Post
  • Has an older sister, Casey, and two younger brothers, Shane and Yunte
Chelsea_Trattner_DB_10102017_144
2018
Midfield
5-6 / -
Chelsea_Trattner_JT_100318_350
2019
Midfield
5-6 / -
Chelsea_Trattner_EC_20190920_479
2020
Defense
5-6 / -