 Manning was born in Calgary, Alberta, Canada, while his mother was on a weekend business trip.Growing up as the youngest of four boys in Sherwood Park, he competed on Team Albera's Under-19 field lacrosse team with two of his brothers; Blake and Blair.In 1999, he played Jr. A indoor lacrosse for the Victoria Shamrocks, where he was voted to 2nd All-Star team in B.C.L.A Jr. A Series and received the team's Sportsman of the Year.