By Andrew Holleran A veteran NFL defensive back has announced his decision to retire from the game at 30 years of age. Ricardo Allen, a veteran safety in the National Football League, has decided to retire from the game following the 2021 season. The former Purdue Boilermakers star played in the NFL from 2014-21. He spent the 2014 to 2020 seasons with the Atlanta Falcons. Allen, a two-time second-team All-Big Ten performer, spent the 2021 season with the Cincinnati Bengals. The defensive back announced his decision on Instagram. “I’ve always wondered how it would feel giving up what most peopl…