Hello dear Steemians, today I bring a sports post that while I researched even I was surprised with some things, here are the ... 10 curiosities about a baseball ball:

1. Costly. The one Mark McGwire hit to hit his 70th homer in the 1998 season is the most expensive ball. Its current price is 3M $.

2. Killer: The only player killed by a ball was Ray Chapman, in August 1920. The ball was modified ending the so-called era of the **Dead Ball * in MLB

3. Durability: The average life of a baseball in a professional game is 7 pitches.

4. Higher speed: Cuban pitcher Aroldis Chapman threw the ball at 105.1 miles/h on September 24, 2010, when he was playing for the Cincinnati Reds. His pitching has the Guinness Record.

5. Size and weight: The baseball is a sphere between 22.5 and 24 centimeters in circumference and 142 grams in weight.

6. Materials: Is made with a combination of cork, rubber, wool and leather.

7 Commercial balls: They were manufactured in 1858 by the company Harwood and Sons, in the USA.

8 Leather: In the 1870's the balls were made with horsehide, but due to how difficult it was to get the material, they decided to change to cowhide

9. Test: To test whether a ball is ready, it is fired from an air cannon at a rate of 85 feet per second into a northern white ash wall and must bounce to no more than 0.578% of its original velocity.

10 Technology: The company Rawlings makes balls with microchips inside that record the speed at which they are thrown.