From the Kansas City metropolitan area, Rosenthal attended Cowley Community College in Kansas, playing shortstop for the Cowley Tigers. The Cardinals selected him in the 21st round of the 2009 amateur draft and he became a starting pitcher in the minor leagues. When Rosenthal made his major league debut, he became the 2,000th player to make an appearance in Cardinals\' franchise history. In the major leagues, he has pitched exclusively out of the bullpen, filling middle relief, set-up, and closing roles. \n', '

An MLB All-Star in 2015, Rosenthal set the Cardinals\' franchise record for saves that season with 48. He was an integral part of the Cardinals\' World Series run in 2013, making 74 appearances, while striking out 108 batters, in ​75 1⁄3 innings pitched, allowing a 2.63 earned run average (ERA), and converting three saves. Moreover, Rosenthal recorded ​20 1⁄3 scoreless innings to begin his postseason career. In 2015, he became the third-youngest pitcher in major league history to record back-to-back 40 save seasons.\n', '

Due to a tear in the ulnar collateral ligament of the right elbow and subsequent reconstructive surgery in August 2017, Rosenthal missed the 2018 season, but returned to play in 2019.\n', '

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