Complex sentence: "Heinie" was a popular nickname for German baseball players in the early part of the 20th Century; in fact, 22 Heinies have played Major League baseball, but Kappel was the original major-league Heinie.
Split into simpler sentences: Heinie was a popular nickname for German baseball players in the early part of the 20th Century. There have been 22 Heinie's who have played Major League baseball, but Kappel was the original major league Heinie.