Dinh began playing League of Legends in the Closed Beta in 2008. Playing alongside his brother, Dan Dinh, he quickly became one of the most recognizable players in the game’s sprouting player base. Andy and his brother then formed one of the earliest competitive League of Legends teams, team All or Nothing, during the League of Legends closed beta in September 2009. Around this time, he also founded the SoloMid website, one of the first websites dedicated to League of Legends, which also doubled as a website for his team. In early 2011, after disagreements between himself and Dan Dinh, All or Nothing disbanded and Andy “ReginaId” Dinh went on to found the TSM team as its mid lane and captain. At the Season 1 League of Legends World Championship in 2011, TSM took 3rd place and $10,000. Team Solomid made many appearances at several independent tournaments, including a second-place finish at Intel Extreme Masters Season VI and a first-place finish at Major League Gaming’s Providence tournament.

Reginald retired from competing at the end of the 2013 season. In the 2014 NA LCS Spring Split he made a brief appearance as mid laner during Week 7 as a substitute while Bjergsen returned to Denmark while renewing his United States visa.