McIntosh was called up to the Major Leagues later in 1974. He went 0–4 in 10 games for the Padres, including five starts, and had a 3.62 ERA. In 1975, he started 28 games for the Padres, and made nine relief appearances as well. McIntosh was 8–15 with a 3.69 ERA during the 1975 season, and pitched four complete games, including his only major league shutout. Following the season, in which he was fourth in the National League in losses,[4] McIntosh was traded along with Larry Hardy to the Houston Astros for Doug Rader on December 11, 1975,[5] and never pitched in the big leagues again.[4] He finished his career by appearing in four games for the Gulf Coast League Astros in 1979.[1] In 1988, Washington State University inducted McIntosh into its WSU Athletic Hall of Fame.[6]