In 1968, Landis enjoyed his finest season in the majors. Working in 38 games, 37 in relief, he compiled a strong 3.15 earned run average and a career-high three saves. He also struck out twice as many hitters (59) as he walked (30). In 1969, Landis was used more frequently, setting career bests in appearances (45) and innings pitched (821⁄3), but he was plagued by a sore arm[1] and his effectiveness diminished. Boston shipped him to Triple-ALouisville in 1970, and Landis left baseball after a brief Triple-A trial in 1971 with the St. Louis Cardinals.
For his MLB career, Landis posted a 9–8 record with a 4.46 ERA in 102 appearances. In six starts, he failed to register a complete game. He was credited with four saves. In 1692⁄3 innings pitched, he allowed 154 hits and 91 bases on balls, with 135 strikeouts.