What is the ruling if F1 adjusts his cap while pitching?

The action of F1 adjusting his cap while pitching is indeed legal as long as it is not directly associated with the delivery of the pitch. Pitchers are permitted to make minor adjustments to their gear, including their cap, provided those actions do not disrupt the rhythm of the game or serve to deceive the base runners in any way. This understanding is rooted in the rules of baseball, which allow pitchers to manage their equipment as long as such actions are not part of the pitch delivery or deemed a delaying tactic.

Adjusting a cap can be seen as part of the natural routine of a pitcher, and as long as the adjustment is made prior to the physical act of pitching, there are no grounds for penalties or warnings. Thus, recognizing the distinction between a routine adjustment and a deliberate act to confuse or delay is critical in applying the rules correctly in this situation.