Allen is an established NHL goaltender but hockey isn't the only sport where he has had success. He was a two-time junior champion at the Kingswood Park Golf Course in his hometown of Fredericton, New Brunswick. The mental toughness required to thrive in golf could only have helped as he worked his way up through the hockey ranks.
Following his rookie season with St. John's of the Quebec Major Junior Hockey League, Allen helped Canada win a gold medal at the 2008 Under-18 World Championship. He also was named the tournament's MVP and top goaltender. Allen was selected by the St. Louis Blues in the second round (No. 34) of the 2008 NHL Draft.