Many of Sir Alex Ferguson’s last few signings have finished their playing careers already. Robin van Persie retired years ago, while Phil Jones hung up his boots due to injuries a year ago. One late Ferguson-era signing is still going strong, with Ashley Young playing Premier League football for Everton at the age of 39. In football terms, Young is anything but his name. Highlighted by the fact his son is now a professional footballer too. Ashley Young son makes debutAshley Young has a son who is now making his first steps as a football player, with Peterborough United. Tyler Young, 18, has be…