Mezue ahịrịokwu na-esonụ: Na July 1, 2009, ọ bịanyere aka na afọ anọ, $6.8 nde nkwekọrịta na Tampa Bay Lightning. Na July 19, 2010, a gbanwere Walker na Philadelphia Flyers, tinyere 4th-round pick na
2011 NHL Entry Draft, na mgbanwe maka n'ihu Simon Gagne.