Forum:Crystal skull: Who is Who?

Lettermen
In the end credits of Indiana Jones and the Kingdom of the Crystal Skull, two lettermen are credited. IMDb has two more + the one called "Joe College" by Indiana Jones makes five. But who is who? And what is the source for the present assignemts between actors and characters?

In the script (available here in pdf or here in html), there are two letterman: the one who gets hit by Mutt and hits him back, and the one who says "Get that greaser!". In the movie, the one who gets hit (called "Joe College" by Indy) is different from the one who hits back.



In the scene shown above, Joe College has been thrown across a table in the rear and is not visible. The letterman on the right is the one who hit Mutt, second from right is the one who said "Get that greaser!". The otheres had neither text nor special action.

We have now: The IMDBb full cast and crew also indicates Bryan Thompson and Adam Masnyk as lettermen.
 * Joe College portrayed by Colin Follenweider (uncredited, source here)
 * Letterman 1 hitting Mutt, identified as the credited Brian Knutson (source?)
 * Letterman 2 portrayed by Dean L. Grimes
 * Letterman 3 unidentified
 * Letterman 4 unidentified

Questions: --Kevingr (talk) 14:35, September 5, 2014 (UTC)
 * Is Brian Knutson really the letterman who hit Mutt (letterman 1)? PLease indicate a source.
 * Which lettermen are portrayed by Dean L. Grimes, Bryan Thompson and Adam Masnyk?