Allen made his List-A debut for the United States against Barbados in the 2008/09 West Indies Cricket Board Cup.

In 2010 he made his unofficial Twenty20 debut for the United States against the UAE in a pre-tournament warm up match for the 2010 ICC World Twenty20 Qualifier.

Allen was selected for the 2016 Caribbean Premier League by the Jamaica Tallawahs, which represented a return of sorts to his home country.

In June 2019, he was named in a 30-man training squad for the United States cricket team, ahead of the Regional Finals of the 2018–19 ICC T20 World Cup Americas Qualifier tournament in Bermuda.

[4] In August 2019, he was named in the United States' squad for the Regional Finals of the 2018–19 ICC T20 World Cup Americas Qualifier tournament.