Brain Injury Blog | HensonFuerst North Carolina

More Injuries from Metal Baseball Bats

2010 July 29th
5 Comments

An article in today’s USA TODAY reports the growing number of head and brain injuries suffered by young athletes due, at least in part, to metal baseball bats. Take the examples of two families, the Sandbergs and the Schlesners:

They’ve each had a son on the verge of dying after being struck on the head by a batted ball and suffering a skull fracture that required emergency surgery. Gunnar Sandberg, 16, was in a coma for three weeks; Cole Schlesner, 15, spent four days in a coma and remained in a hospital for another six weeks.

[The families] both want to see improved safety measures in the youth game — Sandberg a return to wood-only bats, Schlesner the use of helmets by pitchers…. (from USA Today article)

Basically, they are for any change that will make the game safer for kids. Who can blame them? No one expects that a high school baseball game could end in a catastrophic, life-changing injury.

Although there are no hard data linking metal bats to an increase in injuries, there are plenty of anecdotes. Plus, bat manufacturers are quick to try to sell metal bats based on superior performance, but seem to back off when it comes to injury. They say that “exit speeds” off metal bats are only about 6 mph greater than those for wooden bats. On the other hand, those concerned with safety argue that:

  • Metal bats have a “trampoline effect,” the result of the bat compressing and bouncing back when hit by a baseball. Wood bats don’t compress as much because they’re not hollow.
  • Some metal-bat barrels are as much as half-an-inch wider in diameter than wood, increasing the size of their “sweet spot.”
  • Metal bats are lighter and have more of their weight on the handle, which makes them easier to swing faster.
  • In unregulated travel-team tournaments, such as the one where [Cole Schlesner] got hurt, there are no restrictions on bat performance. Before the 2001 season, the National Federation of State High School Associations required high schoolers swing bats in which the differential in weight (in ounces) and length (in inches) is no greater than 3. The previous standard allowed a differential of 5, meaning players could swing bats (such as the popular 34-inch, 29-ounce model) that provided ample plate coverage without sacrificing bat speed. (from USA Today article)

Cole Schlesner’s life was forever changed. he was taken to hospital by helicopter, had surgery to remove part of his skull, and spent time in a coma.

“When he awoke from his coma, he could not talk or walk and his right side was paralyzed. Despite up to nine hours a week of outpatient rehabilitation, he has difficulty walking and lacks full use of his right side. His cognitive development has improved to where he can function in school with some accommodations, but recently he has lost the ability to articulate some syllables and words. His father estimates the cost of his care so far at between $750,000 and $1 million, with 80% to 90% covered by insurance.” (USA Today)

Next Steps

North Dakota has banned metal bats, but other states are considering similar measures. A few individual baseball leagues have made the switch to wooden bats, but not many. There are some research studies being conducted–one at the bioengineering lab at Brown University–to objectively examine whether metal bats are significantly different from wooden bats in terms of their ability to cause catastrophic injuries.

These studies may not fully answer the questions though: researcher Dan Russell, associate professor of applied physics at Kettering University, admits that some of his work has been funded by bat manufacturers. There will, no doubt, be cause for skepticism if his studies show that metal bats are no more dangerous than wooden bats.

In the long run, money may end up helping to change safety regulations. When a larger percentage of metal bat profits have to go to pay the costs of injured children, the manufacturers may decide to take safety seriously. (Last year, manufacturer Hillerich & Bradsby was order by a Montana court to pay $850,000 to the family of a teen player killed by a line drive off a metal bat.)

Meanwhile, we like the advice of Cole Schlesner’s father, who “advocates youth pitchers using helmets, as his three other sons do now.” (USA TODAY)

USA Today article: “As Injuries Mount, Debate Over Metal Baseball Bats Continues”

    5 comments to...
    “More Injuries from Metal Baseball Bats”

    [...] which the differential in weight (in ounces) and length (in inches) is no greater than 3. … bat weight – Google Blog Search Share and [...]


    Dan Russell

    Asking the question whether or not metal bats are more “dangerous” than wood bats is really the wrong question . . . because “dangerous” is not a scientific quantity that can be measured – it is a subjective term that relies in personal interpretation. Here are some facts:
    1) Metal bats can hit balls faster than wood bats. Not every ball hit by a metal bat will be faster than from wood, but the adult sized bats used in high school and college play (that must pass the BESR performance standard) can hit balls up to 6 mph faster than a pro quality wood bat. This potential 6-mph increase for metal bats is built into the BESR standard – and even though many manufacturers and organizations have been arguing for several years that metal bats hit balls with exactly the same speed as wood bats – the fact is that the BESR standard allows metal bats to hit balls 6-mph faster, and this has been experimentally verified with extensive data both in the laboratory and in the field.
    2) however, a 6-mph increase in batted ball speed means only a 0.02 second difference in the time it takes the ball to reach the pitcher. It takes 0.09 seconds to blink an eye, so that extra 0.02 seconds is not going to make much of a difference.
    3) for adult baseball bats used in college and high school, the increase in bat-swing speed for a lighter weight metal bat does NOT produce a faster hit ball. This is a subtle fact that is often misunderstood. The lighter metal bat can be swung faster, but it’s lighter weight means that it is less effective in transferring energy and momentum to the ball – as a result the lighter metal bat does not hit the ball as effectively. Any increase in batted-ball speed due to a faster swing is almost completely cancelled by a reduction in batted-ball speed because of the less effective collision.
    4) bat swing speeds for shorter youth bats (Little League) are not well understood. Those bats are so light (minus 15 drops are common) that there is no way a kid can swing the bat fast enough to make up for the decrease in collision effectiveness. A field study using 13-14 year olds swinging youth bats took place in July 2010, and we are hoping to have analyzed results on bat swing speeds and batted-ball speeds for a variety of wood, metal and composite youth bats later this year.
    5) metal bats do provide a hitter with several advantages: faster swing speed means allows greater control during the swing and more time to watch the ball before committing to a swing. The trampoline effect in the hollow barrel provides a wider region in the barrel where good hits can be made. Inside pitches don’t break metal bats like they break wood bats.
    6) the large barrel (2-5/8inch diameter) youth bats used by many 13-14 year olds for independent and travel leagues are NOT required to pass any performance standard. These “senior league” bats are not regulated by any governing body, and there is very little experimental data (if any) for them from laboratory or field experiments. People concerned for safety should be arguing for performance standard to be applied to these bats – which are extremely popular and widely used by 13-14 year old youth leagues.
    7) balls hit by wood bats can severely injure and kill pitchers and infielders also. This doesn’t make the news as much as metal bat injuries, but I am aware of one teenage pitcher who was killed after a line drive from a wood bat hit him in the neck and two others who were severely injured by balls hit from wood bats.
    8) It is not the bat that causes the injury. It is the ball that causes the injury when it collides with the pitcher’s head. I don’t understand why youth pitchers aren’t required to wear protective helmets. Batters have to wear a helmet to protect them from a pitched ball that reaches top speeds of 70-80 mph for most 13-14 year olds. And, batters must keep their helmets on while running the bases, because kids have died, or been severely injured, after getting hit in the back of the head by a thrown ball while running the bases. Why on earth, aren’t pitchers required to wear helmets? The pitcher is standing in the path of a fast moving, hard projectile that has been hit by a batter who has been trained to “hit the ball as hard as you can right up the middle”. If the safety of pitchers is a concern, then people should be arguing for the use of helmets for all pitchers and infielders.
    9) the question of funding for my bat research is misleading. i have only done three major funded projects. One was to help design a vibration absorber in the knob of a bat to help reduce the painful sting resulting from bat hits. A second project was to help a manufacturer correlate experimental vibration data with computer models of hollow composite bats to better understand the trampoline effect in composite softball bats. The third project, funded by the SGMA, is a study of indirect methods of measuring performance of adult slow-pitch softball bats to help design a hand-held device that an umpire could use to detect illegally altered and modified composite bats that exceed the performance limits. None of these projects had anything to do with the performance of metal baseball bats.


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    [...] Get More Protection in Youth Baseball 2010 August 12th 0 Comments On July 29, 2010, I wrote about the danger of metal bats in youth baseball. There are a growing number of head and [...]


    Baseball Bats

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