7 Famous Baseball Pitches (and some physics behind them)

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iStock

If you watch the playoffs from home, or listen in on the radio, you'll hear a lot of talk about what kind of pitch was just thrown, will be thrown, should be thrown, might be thrown, or, perhaps, shouldn't have been thrown. Cutters, sliders, sinkers—what are they exactly and what's the difference between them? Here's a little primer on six of the most popular pitches out there and a bit of the physics behind them:

1. Fastball - This is the basic, most important pitch in baseball. The first two fingers rest just on (or inside) the seams and the pitcher releases the pitch with the palm pretty much facing the batter, producing maximum velocity. How fast are we talking? Generally in the 90-95 mph range, though some pitchers have been known to hurl over 100 mph. Technically, what you see in the photo is called a two-seam fastball and produces a sidespin that causes the ball to cut in as it approaches the batter. There are other varieties, like the 4-seam fastball, which is thrown by holding the ball with the seams horizontal, rather than vertical. This produces backspin, which creates high pressure under the ball and low pressure on top resulting in the illusion of the ball rising (actually the ball isn't rising, just falling more slowly than it would normally). There's also a split-finger fastball where the first two fingers split, or straddle the seams, which causes the ball to drop a little as it approaches the plate. Despite the movement, the basic idea of a fastball is to overpower the batter, so he swings late and misses.

2. Sinker - If you've ever played wiffleball, you know the ball rises, falls, and curves in and away from a batter depending on where you position the air holes in the ball. Likewise, in baseball, a pitcher can create movement and variation in speed depending on how he releases the ball, or how he spins the ball. Off-speed pitches, like the sinker, are pitches that are released with the palm of the hand facing away from the pitcher. This causes the ball to sink as it approaches the batter. The idea here is to either get him to swing over the ball and miss, or, if he connects with the pitch, to produce a ground ball, rather than a line drive.

3. Changeup - A changeup is like a sinker, in that it's an off-speed pitch, only the palm is turned even further out. All off-speed pitches are similar in that they're thrown with less velocity than the fastball. But the batter doesn't know when one is coming because a good pitcher is able to use the same arm speed as he does for the fastball. So how does he throw it with less velocity? Simple: by pressing the baseball deep into his palm. Less finger contact means less torque and less velocity. So, if a batter is expecting a fastball, slowing down, or "changing up" the speed to, say, 87 mph can trip him up and he'll swing ahead of the ball. Great pitchers can build an entire career on the changeup because they're able to slow it down all the way to around 80 mph. If they can throw a fastball around 95 mph, that's a whopping 15 mph slower and really confuses the batter.

4. Screwball - This is another off-speed pitch that not only sinks, but moves from the pitcher's left side to the right as it approaches the batter. The palm is again pronated away from the pitcher, even further than the sinker and changeup. As the pitcher releases the ball, he twists the ball like a corkscrew. A left-handed batter will see the ball break away from him and a right-handed batter will experience the opposite, as the ball breaks in on him (the reverse is true if the pitcher is left-handed, of course)

5. Cutter - Turning the palm in the opposite direction produces a series of pitches known as breaking pitches. The further the palm is rotated toward the pitcher, the more movement (in most cases, but not all). The first stop over from the fastball is the cutter, which is like a fastball, only it breaks in ever so slightly and is generally thrown a few mphs slower than a fastball.

6. Slider - Basically the same thing as a cutter, a slider is thrown with less velocity than the former and the palm is rotated further toward the pitcher. The slower speed means there's more time for the ball to move, or slide, from one side of the plate to the other.

7. Curveball - A good curveball can be devastating, and also fun to watch. These are the pitches that appear to arc up toward the batter's chest (or even head) before dropping into the strike zone like a bomb as they reach the plate. Of course, not every successful curveball pitcher throws the large arc variety and they need not be so dramatic. Even a small arc keeps the hitter off balance. So how is the amazing trajectory accomplished? The pitcher turns his palm in so far that his hand looks like the letter "C." He then flicks his wrist as he releases the ball (the opposite direction from the screwball) creating topspin. The more topspin, the greater the air pressure difference between the top and bottom of the ball, and the greater the break.

Looking to Downsize? You Can Buy a 5-Room DIY Cabin on Amazon for Less Than $33,000

Five rooms of one's own.
Five rooms of one's own.
Allwood/Amazon

If you’ve already mastered DIY houses for birds and dogs, maybe it’s time you built one for yourself.

As Simplemost reports, there are a number of house kits that you can order on Amazon, and the Allwood Avalon Cabin Kit is one of the quaintest—and, at $32,990, most affordable—options. The 540-square-foot structure has enough space for a kitchen, a bathroom, a bedroom, and a sitting room—and there’s an additional 218-square-foot loft with the potential to be the coziest reading nook of all time.

You can opt for three larger rooms if you're willing to skip the kitchen and bathroom.Allwood/Amazon

The construction process might not be a great idea for someone who’s never picked up a hammer, but you don’t need an architectural degree to tackle it. Step-by-step instructions and all materials are included, so it’s a little like a high-level IKEA project. According to the Amazon listing, it takes two adults about a week to complete. Since the Nordic wood walls are reinforced with steel rods, the house can withstand winds up to 120 mph, and you can pay an extra $1000 to upgrade from double-glass windows and doors to triple-glass for added fortification.

Sadly, the cool ceiling lamp is not included.Allwood/Amazon

Though everything you need for the shell of the house comes in the kit, you will need to purchase whatever goes inside it: toilet, shower, sink, stove, insulation, and all other furnishings. You can also customize the blueprint to fit your own plans for the space; maybe, for example, you’re going to use the house as a small event venue, and you’d rather have two or three large, airy rooms and no kitchen or bedroom.

Intrigued? Find out more here.

[h/t Simplemost]

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10 Fast Facts About Wilma Rudolph

Wilma Rudolph breaks the tape as she wins the Olympic 4 x 100 relay in 1960.
Wilma Rudolph breaks the tape as she wins the Olympic 4 x 100 relay in 1960.
Robert Riger/Getty Images

Wilma Rudolph made history as a Black female athlete at the 1960 Summer Olympics in Rome, Italy. The 20-year-old Tennessee State University sprinter was the first American woman to win three gold medals at one Olympics. Rudolph’s heroics in the 100-meter, 200-meter, and 4 x 100-meter events only lasted seconds, but her legend persists decades later, despite her untimely 1994 death from cancer at age 54. Here are some facts about this U.S. Olympic Hall of Fame member.

1. Wilma Rudolph faced poverty and polio as a child.

When Rudolph was born prematurely on June 23, 1940, in Clarksville, Tennessee, she weighed just 4.5 pounds. Olympic dreams seemed impossible for Rudolph, whose impoverished family included 21 other siblings. Among other maladies, she had measles, mumps, and pneumonia by age 4. Most devastatingly, polio twisted her left leg, and she wore leg braces until she was 9.

2. Wilma Rudolph originally wanted to play basketball.

The Tennessee Tigerbelles. From left to right: Martha Hudson, Lucinda Williams, Wilma Rudolph, and Barbara Jones.Central Press/Getty Images

At Clarksville’s Burt High School, Rudolph flourished on the basketball court. Nearly 6 feet tall, she studied the game, and ran track to keep in shape. However, while competing in the state basketball championship in Nashville, the 14-year-old speedster met a referee named Ed Temple, who doubled as the acclaimed coach of the Tennessee State Tigerbelles track team. Temple, who would coach at the 1960 and 1964 Olympics, recruited Rudolph.

3. Wilma Rudolph made her Olympic debut as a teenager.

Rudolph hit the limelight at 16, earning a bronze medal in the 4 x 100-meter relay at the 1956 Summer Olympics in Melbourne, Australia. But that didn’t compare to the media hype when she won three gold medals in 1960. French journalists called her “The Black Pearl,” the Italian press hailed “The Black Gazelle,” and in America, Rudolph was “The Tornado.”

4. After her gold medals, Wilma Rudolph insisted on a racially integrated homecoming.

Tennessee governor Buford Ellington, who supported racial segregation, intended to oversee the Clarksville celebrations when Rudolph returned from Rome. However, she refused to attend her parade or victory banquet unless both were open to Black and white people. Rudolph got her wish, resulting in the first integrated events in the city’s history.

5. Muhammad Ali had a crush on Wilma Rudolph.

Ali—known as Cassius Clay when he won the 1960 Olympic light heavyweight boxing title—befriended Rudolph in Rome. That fall, the 18-year-old boxer invited Rudolph to his native Louisville, Kentucky. He drove her around in a pink Cadillac convertible.

6. John F. Kennedy literally fell over when he invited Wilma Rudolph to the White House.

President Kennedy, Wilma Rudolph, Rudolph’s mother Blanche Rudolph, and Vice President Johnson in the Oval Office.Abbie Rowe/White House Photographs/John F. Kennedy Presidential Library and Museum // Public Domain

In 1961, Rudolph met JFK in the Oval Office. After getting some photos taken together, the President attempted to sit down in his rocking chair and tumbled to the floor. Kennedy quipped: “It’s not every day that I get to meet an Olympic champion.” They chatted for about 30 minutes.

7. Wilma Rudolph held three world records when she retired.

Rudolph chose to go out on top and retired in 1962 at just 22 years old. Her 100-meter (11.2 seconds), 200-meter (22.9 seconds), and 4 x 100-meter relay (44.3 seconds) world records all lasted several years.

8. Wilma Rudolph visited West African countries as a goodwill ambassador.

The U.S. State Department sent Rudolph to the 1963 Friendship Games in Dakar, Senegal. According to Penn State professor Amira Rose Davis, while there, Rudolph independently met with future Ghanaian president Kwame Nkrumah’s Young Pioneers, a nationalist youth movement. She visited Mali, Guinea, and the Republic of Upper Volta (now Burkina Faso) as well.

9. Denzel Washington made his TV debut in a movie about Wilma Rudolph.

Before his Oscar-winning performances in Glory (1989) and Training Day (2001), a 22-year-old Denzel Washington portrayed Robert Eldridge, Rudolph’s second husband, in Wilma (1977). The film also starred Cicely Tyson as Rudolph’s mother Blanche.

10. Schools, stamps, and statues commemorate Wilma Rudolph’s legacy.

Berlin, Germany, has a high school named after Rudolph. The U.S. Postal Service issued a stamp celebrating her in 2004. Clarksville features a bronze statue by the Cumberland River, the 1000-capacity Wilma Rudolph Event Center, and Wilma Rudolph Boulevard. In Tennessee, June 23 is Wilma Rudolph Day.