What position did Zack Greinke primarily play?

Which player was nicknamed "Moose"? What position did Jake Arrieta primarily play? Jake Arrieta is best known for playing with which MLB team? What uniform number did Jake Arrieta wear with the Cubs? What position did Luis Gonzalez primarily play? Luis Gonzalez is best known for playing with which MLB team? What uniform number did Luis Gonzalez wear with the Diamondbacks? Which player was nicknamed "Gonzo"?