Final answer:
George Gmelch's research suggests that pitchers and hitters in baseball are the roles that involve the most rituals, which players believe contribute to their success and help manage anxiety.
Step-by-step explanation:
According to George Gmelch's study on rituals and their impact on the psychology of baseball players, he identifies the roles of pitchers and hitters as those that involve the most rituals in baseball.
Gmelch's research supports the view that baseball players may engage in specific rituals, such as unique eating habits, dressing routines, and even the way they travel to the ballpark.
These routines form a part of what Gmelch terms "baseball magic", which players believe contributes to their success and helps to manage anxiety, particularly in a sport where aspects like weather and chance play significant roles.