Johnson was elected in the first round (seventh overall) in the 2007 National Lacrosse League entry draft out of Bellarmine University.
He was named NLL Rookie of the Week for his five-point performance (two goals, three assists) in a 14–6 win over Edmonton on April 11.
Johnson currently plays for the Maple Ridge Burrards of the WLA in the summer after being released from the Langley Thunder.
He was awarded the Ed Bayley Trophy as the 2007 WLA Rookie of the Year in 2007 after scoring 27 goals and 27 assists for 54 points.
Johnson was the Thunder's first round WLA draft pick out of the Junior A lacrosse Delta Islanders where he holds the all-time scoring record.