Earlier today I wrote a piece on where Celtic stands in the UEFA rankings compared to Rangers in the all-time standings for the Champions League since its 1992 restructuring. You can read that here. But that piece got me thinking. With Celtic having a long history in the competition since the Martin O’Neill era, which former players at Parkhead have the most appearances in the Champions League? If you think back, Neil Lennon, Henrik Larsson and Scott Brown all have great experience in Europe’s premier competition. Even the likes of Thomas Gravesen has a decent record in the tournament for Celt…