Kammala wannan jumla: Greaves ya fara 2018 a matsayin mai wasan motsa jiki na Level 10. Ta yi gasa a gasar Nastia Liukin inda ta gama ta 8 a cikin duka. Mako guda daga baya ta yi gasa a KPAC Elite Qualifier inda ta sami maki 51.650 kuma ta cancanci zama fitattun matasa. A farkon watan Yuli, Greaves ta fafata a gasar American Classic inda ta zama ta huɗu a cikin duka-kusa a bayan Kayla DiCello, Konnor McClain, da Skye Blakely amma ta farko a kan sanduna marasa daidaito. Daga baya a wannan watan ta yi gasa a Wasannin Amurka na 2018 inda ta kasance ta tara a cikin motsa jiki da kuma na uku a filin motsa jiki. A watan Agusta Greaves ya yi gasa a gasar
Gasar Gasar Gymnastics ta Kasa ta Amurka ta 2018, Gasar Gasar Gasar Kasa ta farko. Ta gama a matsayi na shida a cikin duka kuma sakamakon haka an kara da ita ga Junior National Team.