Proponents of aluminum bats say they can present just as many facts as the wood bat advocates to support their case. Here is a sampling:
n A 17-year-old high school baseball player, Ryan Nielsen, died in June 2004 when he was struck by a batted ball while pitching to a friend in a batting cage. The ball was a line drive off a wooden bat that came back and hit him in the neck, rupturing his carotid artery.
n Erik Davis, a pitcher in the Cape Cod summer wood bat league, was struck in the eye by a line drive in June 2006 and subsequently needed surgery to replace his broken orbital socket and cheekbone.
n In a major league game in August 2006 between Atlanta and Florida, plate umpire Jerry Layne was carted off the field after he was hit in the head and face by the barrel of a broken bat.
n A study commissioned by the Illinois High School Association comparing wood bats and non-wood bats during the same season found in 2007 that there was no statistical difference in injuries.
n A study by Kettering University (Mich.) found the difference between a ball hit by a wood bat and a ball hit by an NCAA-approved metal bat is one-fifth of the time required to blink an eye, and that it was hard to believe the extra time would make a difference in the pitcher being able to protect himself.
n The Medical/Safety Advisory Committee of USA Baseball concluded in 2006 after a two-year study that injuries in college summer leagues using wooden bats were more severe than NCAA injuries from using aluminum bats.
n Minor League Tulsa Drillers hitting coach Mike Coolbaugh died in August 2007 less than an hour after he was struck in the head by a line drive off a wood bat.