The following dialogue ensues:
BAKER: We did a little research. It's a 19th-century lacrosse ball made of hair and deerskin. Used by the, uh, Iroquois, apparently.
MORRIS: And what do Sarah Kaiser, Anne Tanaka, and Lizzy Adler have in common? It's your Native American history class in which that lacrosse ball was a well-known visual aid.
Kudos to the writers for going the extra mile. Or at least an extra foot. In a story involving lacrosse, they actually mentioned its Native origin.
For more on the subject, see TV Shows Featuring Indians.