What position did Vladimir Guerrero Jr. primarily play?

What uniform number did Todd Helton wear with the Rockies? What position did Roy Halladay primarily play? Roy Halladay is best known for playing with which MLB team? What uniform number did Roy Halladay wear with the Blue Jays? Vladimir Guerrero Jr. is best known for playing with which MLB team? What uniform number did Vladimir Guerrero Jr. wear with the Blue Jays? What position did Roberto Alomar primarily play? What position did Walter Johnson primarily play?