Maille joined the Meridell team in 2007, replacing Vitri Sitol. He lacks experience, but is a swift scorer. In the run up to the sixth Altador Cup, he sprained his tail in the Battledome. However, he made a full recovery before the games began. He retired in the run up to the eighth Cup.
Gregorio participated as a member of the Meridell Yooyuball team from 2007 to 2012.