Misc: In which sport is a 'hole-in-one' possible?

Questions

Who is the only baseball player to have been killed in a major league game?

Who is the only man to have been both chief justice and president of the u.s?

Who is the only singer to have no. 1 hits in the 50's, 60's, 70's, 80's and 90's?

Who is the patron saint of children?

Who is the patron saint of norway?