By Matt Hladik After 12 years in the big leagues, former Cy Young pitcher Jake Arrieta has announced his retirement. Arrieta, who last pitched for the San Diego Padres last season, revealed he was stepping away during an appearance on Barstool Sports’ “Pardon My Take” podcast. “Well, I haven’t signed the papers, but I’m done. It’s time for me to step away from the game,” Arrieta said. “At some point, the uniform goes to somebody else. It’s just my time.” A fifth-round pick of the Baltimore Orioles out of TCU in 2007, Arrieta made his MLB debut three years later. He spent three-plus years in Ba…