Joakim Soria began his career in the Mexican League before being selected in the Rule 5 Draft by the Kansas City Royals from the San Diego Padres organization. This turned out to be a wise investment for KC as Soria finished seventh in the American League Rookie of the Year voting in 2007, with 17 Saves. Over the next three seasons, Soria established himself as one of the best closers in baseball, earning All-Star Game selections in 2008 and 2010 and recording 105 Saves. Although he finished tenth for the Cy Young in 2010, he was arguably better in his first All-Star year, with 42 Saves, a 1.60 ERA and a WHIP of 0.861. However, Soria's performance slumped in 2011 (28 Saves, 4.03 ERA, 1.276 WHIP), and he missed the entire 2012 season due to Tommy John Surgery to repair a torn UCL. Although he made a comeback, he was never the same as before.
Over the next nine seasons, Soria played for nine different teams (Texas, Detroit, Pittsburgh, Kansas City again, Chicago (AL), Milwaukee, Oakland, Arizona, and Toronto), all out of the bullpen where he was sometimes again the closer. During this period, he had 69 Saves and a total of 229. While Soria never regained his past glory in Kansas City, he was good enough to find work for nearly a decade after.