Baseball diamonds: the lefthander's best friend

July 7, 2008

Baseball diamonds are a left-hander's best friend. That's because the game was designed to make a lefty the "Natural," according to David A. Peters, Ph.D., the McDonnell Douglas Professor of Engineering at Washington University in St. Louis, and uber baseball fan. Peters is a mechanical engineer who specializes in aircraft and helicopter engineering and has a different approach to viewing America's Favorite Pastime.

First of all, some numbers.

"Ninety percent of the human population is right-handed, but in baseball 25 percent of the players, both pitchers, and hitters, are left-handed," said Peters, a devoted St. Louis Cardinal fan who was at Stan the Man's last ball game at Sportsman's Park in 1963.

"There is a premium on lefthanders for a number of reasons. For starters, take seeing the ball.

"A right-handed batter facing a right-handed pitcher actually has to pick up the ball visually as it comes from behind his (the batter's) left shoulder. The left-handed batter facing the right-handed pitcher has the ball coming to him, so he has a much clearer view of pitches."

Then, Peters says, consider the batter's box. After a right-hander connects with a ball, his momentum spins him toward the third-base side and he must regroup to take even his first step toward first base. In contrast, the left-hander's momentum carries him directly toward first.

"The left-handed batter has a five-foot advantage over the right-handed batter," says Peters. "And that means the lefty travels the 90 feet to first roughly one-sixth of a second faster than the righty. That translates to more base hits for the left-hander, whether singles or extra base hits because lefties are getting to the bases more quickly."

Even Jim Thome and Jason Giambi?

The left-handed pitcher generally is much more difficult to steal off, as, from his stretch, he peers directly at the runner; the right-hander must look over his shoulder and wheel to first base, giving the runner more of a warning of the pitcher's intent.

Positions advantageous to southpaws are pitching, first base and right field. For the positions, the advantage is the favorable angles lefties get, enabling them to throw the ball more quickly across the diamond to second, third and home. One position a lefty rarely plays is catcher, for the obvious reason that it is difficult for a southpaw catcher to throw over so many right-hand batters.

"It wasn't all that long ago when first basemen were predominantly left-handed and most right fielders were left-handed," Peters says. "That has changed at least since the late sixties."

There's even a bias toward the lefthander in ballpark design. Right field in most parks (just think of Yankee Stadium and Fenway Park) is usually shorter than left field because of the preponderance of right-handed hitters.

While traditional thinking holds that the right-handed batter has the advantage over the left-handed pitcher, because the breaking ball goes into the batter's power threshold, it's not always the case, says Peters. And it's that familiarity thing again.

"Because only 10 percent of the population is left-handed, kids grow up and mature in baseball seeing a left-hander just 10 percent of the time they bat," he says. "So, it can be hard for both lefties and righties to face a southpaw. It's why some left-handed batters look dreadful matched against a lefty."

Some batters don't like facing southpaws because their ball is purported to have a natural movement away from a right-hander and into a lefty.

"There's no scientific evidence to support this, but I wonder if lefties get that movement from learning to write in a right-hander's world," Peters says.

Source: Washington University in St. Louis


print this article email this article download pdf blog this article bookmark this article     Stumble it Digg this share on Facebook retweet share on Reddit add to delicious
Rate this story - 4.1 /5 (26 votes)

Rank Filter

Move the slider to adjust rank threshold, so that you can hide some of the comments.


Display comments: newest first

  • Egnite - Jul 08, 2008
    • Rank: not rated yet
    Aye they fair love their baseball in Cuba! Same in the US I think...not sure who the commies are tho, the country that looks after its ppl, or the cuntry that rips off its ppl?? ;-P

July 7, 2008 all stories

Comments: 1

4.1 /5 (26 votes)
  • Stumble this up

  • Digg this

  • share this



  • hide
  • Relevant PhysicsForums posts

Other News

Climate change could boost incidence of civil war in Africa

Other Sciences / Social Sciences

created 16 hours ago | popularity 2.2 / 5 (13) | comments 5

Climate change could increase the likelihood of civil war in sub-Saharan Africa by over 50 percent within the next two decades, according to a new study led by a team of researchers at University of California, Berkeley, ...


Do kids benefit from homework?

Do kids benefit from homework?

Other Sciences / Social Sciences

created 11 hours ago | popularity not rated yet | comments 3

(PhysOrg.com) -- Homework is as old as school itself. Yet the practice is controversial as people debate the benefits or consider the shortcomings and hassles. Research into the topic is often contradictory ...


As robots become more common, Stanford experts consider the legal challenges

Other Sciences / Social Sciences

created 14 hours ago | popularity 4.7 / 5 (3) | comments 0

(PhysOrg.com) -- They already detect and defuse bombs, control traffic patterns and do some basic household chores. And scientists predict that pretty soon, robots will be using artificial intelligence to play a larger role ...


The cause behind the characteristic shape of a long leaf revealed

The cause behind the characteristic shape of a long leaf revealed

Other Sciences / Mathematics

created 16 hours ago | popularity 5 / 5 (2) | comments 0

Applied mathematicians dissected the morphology of the plantain lily (Hosta lancifolia), a characteristic long leaf with a saddle-like arc midsection and closely packed ripples along the edges. The simple ...


5-day delivery no sure cure for postal woes, economist says

Other Sciences / Economics

created 12 hours ago | popularity 2 / 5 (1) | comments 0

Scaling back mail delivery from six days a week to five may be the best bet to stem mounting U.S. Postal Service losses, but could still be a gamble, says a University of Illinois economist who has studied the agency's persistent ...