Merrill is ranked No. 21 in the American Junior Golf Association and No. 33 in the Golfweek/Sagarin Rankings. She won the 2021 Rome Junior Classic presented by Piedmont Bank. Also in 2021, she finished T3 at the Sung Hyun Park Junior Championship and T7 at The PING Invitational. Merill has verbally committed to Stanford University upon her graduation in 2023.