Arsenal thought they hit the jackpot when they signed a young Calum Chambers from Southampton nearly a decade ago, but the move did not pan out as well as some hoped. Arsene Wenger wanted to add a centre-back to his squad following the departure of Thomas Vermaelen in the summer of 2014, and caused a lot of surprise when Arsenal confirmed the signing of Chambers seemingly out of nowhere from the now-Championship side. The then-teenager had made just 22 Premier League appearances in his career prior to his move, but stood out as a top-tier prospect in a Southampton team containing the likes of …