Pepper is perhaps best known for his role as the sniper Private Daniel Jackson in "Saving Private Ryan". He portrayed Corrections Officer Dean Stanton in "The Green Mile", appeared as Frank Slaughtery in Spike Lee's "25th Hour", as journalist Joseph L. Galloway in "We Were Soldiers", his role as the heroic antagonist of the film "Battlefield Earth", his depiction of Roger Maris in Billy Crystal's HBO film "61*", as Dale Earnhardt in the ESPN produced film ', and as Dan Morris in the film "Seven Pounds", with Will Smith. He recently had roles in "Casino Jack" and the Coen brothers' "True Grit". Pepper provided the voice for Alex Mercer, the protagonist of the video game "Prototype" and the voice for Corporal Dunn, a character in the video game '.