Coach Vallarelli is a men’s and women’s college coach, youth lacrosse club director (Team 91 Tri State) and professional lacrosse player in both the Women's Field and the Men's Box Lacrosse Game. She also runs her own business, RV Lacrosse, which focuses on In-Person and Virtual Training Methods, in both box and field, for players of all ages, skill and genders. Rachel was also elected to the World Lacrosse Women’s Box Lacrosse Working Group in 2021, working to grow the game for box lacrosse for women at the national and international levels.

A current StringKing Sponsored Athlete, Vallarelli loves inspiring the next generation of players, in both the men's and women's game as well as in both lacrosse disciplines of field and box.

Vallarelli brings a wealth of coaching and playing experience with her. A 2011 graduate of School of the Holy Child in Rye, N.Y., she starred at goalie for the Gryphons’ lacrosse squad, earning four varsity letters and helping the team to having its first ever winning record, and playoff berths after that. She holds the record for career saves and holds second and third place for Single Season Saves. Her career high was 24 stops versus Greenwich Academy her Senior Year.

During her time at Holy Child and before she committed to play at UMass, Vallarelli was selected to the US U19 National Team squad and has been in the US System since 2010.

She continued her lacrosse career at the University of Massachusetts, where she started in goal for three seasons, earning numerous accolades along the way. During her goalie days at UMass, Vallarelli registered 48 victories and had a goals-against-average of 6.77 — both of which ranks second in program history. Her career goals-against-average is eighth in NCAA history, her 2015 GAA is 10th in NCAA History and she was the NCAA save- percentage champion in 2015 (.523). She is also a two-time NCAA GAA Runner Up (6.26 in 2014 and 5.77 in 2015).

UMass won four-consecutive Atlantic 10 championships and was undefeated in conference play (with four NCAA Tournament Appearances & two First Round Wins) while Vallarelli played goalie. She was also selected as the conference’s Defender of the Week seven times and earn the 2015 Atlantic 10 Defensive Player of the Year Award.