despite a relatively mild 3.55 ERA. On August 19, he pitched his first career shutout against the franchise that drafted him. New Phillies manager Danny Ozark moved Twitchell back into the bullpen for the season. After posting a 1.98 ERA in six relief appearances, Twitchell was moved back into the starting rotation. He pitched consecutive shutouts against the Astros and San Diego Padres on June 5 and 10. He also went 3-for-3 with a double and a run batted in against the Padres. He was 8–3 with a 2.29 ERA when National League manager Sparky Anderson honored Twitchell as the Phillies' sole representative at the 1973 Major League Baseball All-Star Game. He pitched the sixth inning, and gave up a double to the first batter he faced (Kansas City's John Mayberry). He then struck out Reggie Jackson and retired the next two batters to escape the inning without giving up a run. When the regular season resumed, he took over where he left off. He shut out the Pittsburgh Pirates and Chicago Cubs in his first two starts after the All-Star break. Facing the Cubs again on September 18, he collided with Billy Williams while covering first base on a ground ball. The collision ended his season. He finished 13–9 with 169 strikeouts. His 2.50 ERA was third best in the NL. The injury sidelined Twitchell until May the following season. The Phillies were cautious with Twitchell, using him in six short relief appearances before his first start. In which, he was kept in just long enough to be the pitcher of record. He was 5–2 with a 4.14 ERA as a starter when he was used for eleven innings on August 5 against the St. Louis Cardinals. His season took a sharp downward turn from there. He went 0–6 over the remainder of the season with a 6.61 ERA. Twitchell ended April at 1–3 with a 7.06 ERA. He pitched better in May (2.81 ERA), but by then the decision had been made to give top prospect and former first round pick Larry Christenson Twitchell's rotation spot. After a final start against the Mets on July 6, Twitchell was moved into the bullpen, and assigned to "mop up duty." Twitchell made fifteen relief appearances over the rest of the season. With the exception of one extra innings game, the Phillies were trailing in each of them when Twitchell was