[1] Alphonso played minor hockey with the OMHA’s Halton Hurricanes, and was chosen in the 7th round (140th overall) of the 2000 OHL Priority Selection by the Sudbury Wolves.
[3] Prior to the 2009-10 season, Alphonso attended the NHL's Amateur Exposure Combine, a program for former junior and college players who had an interest in becoming an official.
On 25 September 2011, Alphonso worked his first Ontario Hockey League game in Oshawa, as the Sault Ste.
[8] In 2015 (his first season under the contract), he worked the American Hockey League's Calder Cup final series between the Utica Comets and Manchester Monarchs.
[11] Before he joined the NHL's officiating staff in 2014, Alphonso had worked for RBC Bank as a financial planner.