On May 29, 2016 — Stephen Strasburg of the Nationals improves to 9-0 on the year with a 10 – 2 win over the Cardinals, powered by a pinch-hit grand slam off the bat of Jayson Werth and a two-run homer by Wilson Ramos. Strasburg sets a new franchise record for most wins to start the year by a starting pitcher, besting the eight recorded by Pedro Martinez to start off his Cy Young Award-winning 1997 campaign. He also has 12 straight wins dating back to the previous September, which ties the franchise record shared by Dennis Martinez (1989) and Livan Hernandez (2005).

Source:
Baseball Reference May 29