George Atkinson

饰：自己

威尔·莱曼

Will Lyman

饰：Self - Narrator,

Ann McKee

饰：Self - Neuropathologist, BU CTE Center,(as Ann McKee MD)

珍妮·玛丽·拉斯卡斯

Jeanne Marie Laskas

饰：Self - GQ, Game Brain

Leigh Steinberg

饰：Self - Sports Agent

Michael Oriard

饰：Self - Kansas City Chiefs, 1970-73

Paul Tagliabue

饰：Self - NFL Commissioner,(archive footage)

Alan Schwarz

饰：Self - The New York Times

Jane Leavy

饰：Self - Journalist

Sarah Childress

Sarah Childress

饰：Self,Reporter

Caitlin McNally

Caitlin McNally

饰：Self - Reporter

Harry Carson

饰：Self - Author, Captain For Life

Jim Otto

Jim Otto

饰：Self - Oakland Raiders, 1960-74

Steve Young

饰：Self - San Francisco 49ers, 1987-99

Robert Cantu

饰：Self - Neurosurgeon, Boston University,(as Robert Cantu MD)

Roger Goodell

饰：Self - NFL Commissioner,(archive footage)

Chris Nowinski

Chris Nowinski

饰：Self - Co-Director, BU CTE Center

Maxine Waters

饰：Self - Representative, California,(archive footage) (as Rep. Maxine Waters)