What about bad throws that don't count as errors?

How often does a bad throw occur that's not called an error but costs the defensive team a base? An example would be a base hit with a man on first. The runner goes to third, the outfielder attempts to nail him, but comes up short, allowing the batter to get to second. This is not ruled an error, but Baseball Info Solutions categorizes this as a defensive misplay. This play, and eight other similar throwing misplays tracked by BIS that cost the defense at least one base but are not ruled as errors, occur about once per game. Quite often.

Here is a complete list of throwing misplays by team for 2006 (through August 20).

The Cardinals demonstrate good throwing fundamentals while the defending World Champion White Sox are last among American League teams. White Sox outfielders also have the fewest baserunner kills in the American League with only six thus far on the season. Ozzie Guillen's follow-up class to his "Bunting School" may be "Throwing School."