What brand and size and weight of baseballs are legal in high school baseball in Illinois?

A local baseball training facility is promoting the use of what I feel is very a dangerous activity for developing throwing athletes. Throwing weighted baseballs to improve velocity has always been frowned upon. Does an orthopedic have an opinion?

Hey everyone. I am starting to get signed and collect baseball autographs, so am looking to buy official major league baseballs. At target and sports authority down here, they go for $16.99, does anyone know where I can find them cheaper online?

I live in Fitchburg, Massachusetts. Ihave auto graphed baseballs and hockey sticks. How and where can i find out who signed them and how much it is worth? Please answers since i alreay asked this but didnt get any answers. This is very important. P.S> Do you know who is or was player number 97 for the Boston Bruins? Thank you very much and i wont forget to pick a best answer!