By Alek Arend On Friday, the New Orleans Saints officially announced the signing of veteran free-agent linebacker Kiko Alonso. However, it appears he’s changed his mind about his future in the National Football League. Alonso, 31, is reportedly retiring from professional football just a day after officially signing with the Saints. An unexpected move by the veteran, but he’s clearly ready to call it a career. “Kiko Alonso has retired, per source. The #Saints brought him in for one training camp practice, after playing the 2019 season in New Orleans. He’s decided to hang it up after 6 seasons i…