What position did Catfish Hunter primarily play?

What position did Reggie Jackson primarily play? What position did Dennis Eckersley primarily play? Dennis Eckersley is best known for playing with which MLB team? What uniform number did Dennis Eckersley wear with the Athletics? Catfish Hunter is best known for playing with which MLB team? What uniform number did Catfish Hunter wear with the Athletics? What position did Mark McGwire primarily play? Which player was nicknamed "Big Mac"?