In 256 regular-season games pitched, including 201 starts, McGlothlin compiled a 67–77 won–lost mark, with 36 complete games, 11 shutouts, and a 3.61 earned run average. In 1,300 career innings pitched, he permitted 1,247 hits and 418 bases on balls, striking out 709. He earned three career saves. In the postseason, he went unscored upon in one inning pitched during the 1972 National League Championship Series (his only LCS appearance), and in his two World Series starts, he allowed eight hits, four bases on balls, and eight earned runs in 8 innings pitched without earning a decision.