Jack Flaherty is an American professional baseball pitcher for the Los Angeles Dodgers of Major League Baseball (MLB). He has previously played in MLB for the St. Louis Cardinals, Baltimore Orioles, and Detroit Tigers. Flaherty was drafted by the Cardinals in the first round of the 2014 MLB draft and made his MLB debut with them in 2017. MLAM Signing , Jan 10, 2021. Jack Flaherty had hand Signed St Louis Cardinals MLB Regulation Size Pitching Rubber. Bold red full signature, inscribed #22. MLB Authentic Hologram # VS684553.