Derek "Frost" Westbrook

 is a Staff Sergeant and Delta Force operator

.Sandman is his senior.Frost has been confirmed as one of the playable characters in ''Call of Duty: Modern Warfare 3. ''Not much else is known about him at this time.

Trivia

 * He and Sandman are the only known American characters using callsigns as their name.
 * He is also the fifth playable Character in the Modern Warfare series to be voiced. The first four people being Soap, Price, the AC130 TV Operator, and Joseph Allen.MW3-Screenshot-Frost-01.jpg