Rubuta ci gaba ga wannan sakin layi - O'Neil ya fara wasanni na nakasassu yayin da yake a sansanin wasanni a Birnin New York yana da shekaru goma sha biyu. Ta fara wakiltar Ireland a wani babban gasa na kasa da kasa a Birmingham a lokacin gasar zakarun duniya ta 1998 IPC Athletics, inda ta lashe lambar zinare a wasan jefa lu'u-lu'u na mata F51. O'Neil ta yi gasa a wasannin Paralympic na bazara guda uku a lokacin aikinta, farawa a Wasannin Paralympic na bazara na 2000 a Sydney. Da farko ta kware a wasan diski, wasan kwaikwayon ya ci gaba a cikin aikinta na gaba don shiga cikin wasannin kulob din. Kodayake bai yi gasa a Athens ba, O'Neill yana cikin tawagar 'yan wasan Ireland a duka wasannin 2008 a Beijing da kuma wasannin 2012 a London
Ka yi haƙuri. Ta kawai Paralympic podium gama zo a London, inda ta lashe azurfa a cikin &lt;a href="Athletics%20at%20the%202012%20Summer%20Paralympics%20%E2%80%93%20Women%27s%20discus%20throw"&gt; jefawar Disc - F51/52/53&lt;/a&gt;.