A-Rod on his way to a "different" 30-30 club

With 18 errors and 21 homers through Saturday, Alex Rodriguez is within striking distance of a rather unique record.  The "30 homer/30 ERROR" club is even more exclusive than the "30 HR/30 SB" club.

Here are the members, with their position, season of infamy, and homers and errors for the year.

POS Name                   YEAR E HR
2B    Rogers Hornsby    1922 30 42
2B    Rogers Hornsby    1925 34 39
3B    Eddie Mathews    1953 30 47
SS    Ernie Banks          1958 32 47
3B    Harmon Killebrew 1959 30 42
3B    Tony Perez           1969 32 37
3B    Tony Perez          1970 35 40
2B    Davey Johnson      1973 30 43
3B    Pedro Guerrero     1983 30 32
3B    Troy Glaus           2000 33 47