He joined the U-14 National Team and was then recruited to their U-15 residency program at the IMG Academy in Bradenton, Florida, where he lived and trained.

Wagner made his first appearance with FCD's first team on July 19, 2006, as a substitute in a 2-0 friendly match win against UANL Tigres.

In 2007, Blake made his MLS career debut on September 30, 2007, starting in a 0–3 loss against Houston Dynamo.

[3] After a successful 2011 preseason trial, Wagner signed with the Major League Soccer version of Vancouver Whitecaps FC on March 11, 2011.

[5] On August 16, 2011, Wagner was signed by Major League Soccer club Real Salt Lake.