The growing soccer card market got a big boost on Sat., Sept. 11 as Cristiano Ronaldo made a glorious return to his former club, Manchester United. While soccer has clearly supplanted auto racing as the fifth largest sport in the sports card market, there really is no North American comparable to Ronaldo joining Manchester United. If there was a Mount Rushmore for soccer, … [Read more...] about Ronaldo’s Return to Manchester United Sparks Soccer Market