Why do they wear their pant legs at the knees and not the ankles like in major league baseball?

Answer 1

Why does "who" were their pants legs at the knees? If you mean some minor leaguers, in some cases the major league team dictates how its players must wear their pants on their minor league affiliates. All major leaguers don't wear their pants legs to the ankles. Some wear them only to their knees. There is no set rules for major leagues on where their pants legs must go. Most wear them where they feel most comfortable. Some players who wear their pants legs hige are Soriano of the Cubs, Berkman of the Astros, Varatek of the Red Sox. Some players change from game to game high sometimes, low at other times.