Philadelphia Phillies pitcher Andrew Painter , 23, has struggled to begin his MLB career. Overall this season, Painter is 1-4 with a 6.89 ERA at the back end of a Phillies' rotation that features Zack Wheeler, Cristopher Sánchez , Jesús Luzardo and Aaron Nola . While he’s shown bits and pieces of the potential and upside he brings, it’s clear that there are adjustments he needs to make to be successful at the Big League level. His first seven appearances in the Majors have exposed what the Phillies’ No. 2 prospect needs to work on to improve as a pitcher. The primary issue that stands out for Painter is that he needs to improve his fastball. Andrew Painter is struggling with his fastball this season May 7, 2026; Philadelphia, Pennsylvania, USA; Philadelphia Phillies pitcher Andrew Painter (24) throws a pitch during the fourth inning against the Athletics at Citizens Bank Park.…