Final answer:
The proper 'if-then' form for the statement 'All pitchers are baseball players' is, 'If a person is a pitcher, then they are a baseball player.' The legit converse would be statement a), but it is not necessarily true for all baseball players. Statements c) and d) are not correctly derived from the initial premise.
Step-by-step explanation:
The given statement 'All pitchers are baseball players' translates into a conditional, if-then form as follows: 'If a person is a pitcher, then they are a baseball player.' This is statement b) and is logically the correct conditional statement derived from the initial premise.
Statement a), 'If a person is a baseball player, then they are a pitcher,' is a converse of the original statement. However, it is not always true since not all baseball players are pitchers. Statement c), 'Being a baseball player is unrelated to being a pitcher,' contradicts the initial premise and is not a correct if-then form related to it. Statement d), 'If a person is a pitcher, then they are not a baseball player,' is the negation of the original conditional statement and thus is also incorrect.