As Rangers’ season collapses in the final furlong, Leon Balogun’s Ibrox career is at a crossroads. The 36-year-old centre-half was arguably the club’s top performing defender when recalled this season but in the final three games of the Premiership campaign Rangers lost Leon to a back injury. Back in the starting XI for the Scottish Cup Final against Celtic – a match Rangers were once again desperately unlucky with VAR in – this was perhaps the defender’s final chance to win a new contract. And heaven knows Leon Balogun tried. Now, the Nigerian defender, one of six out of contract in the summe…