 Complete the following phrase:  For 1991, Martínez improved. For the fourth year in a row, he was the Opening Day starter, pitching against the Pittsburgh Pirates at Three Rivers Stadium. He threw seven innings of work while allowing one hit and no runs with five strikeouts and two walks as the Expos won 70. It was his first and only Opening Day win with the Expos. He went 1411 with a 2.39 ERA a career low in 31 games and 222 innings of work. He had nine complete games while having five shutouts, the latter being a career high. July proved to be a highlight He had 123 strikeouts with 62 walks while being named to the 