Question: Are John Dufresne and David Mamet both Pulitzer Prize winners?

Context articles: Cosmos Club
John Dufresne
List of Phi Gamma Delta members
Robert Weil (editor)
David Mamet
James Foley (director)
Smartish Pace
Glengarry Glen Ross
Trident Media Group
Pulitzer Prize for Breaking News Photography

The Cosmos Club is a private social club in Washington, D.C. that was founded by John Wesley Powell in 1878 as a gentlemen's club.
 Among its stated goals is "The advancement of its members in science, literature, and art".
 Cosmos Club members have included three U.S. presidents, two U.S. vice presidents, a dozen Supreme Court justices, 36 Nobel Prize winners, 61 Pulitzer Prize winners, and 55 recipients of the Presidential Medal of Freedom.
 Since 1988, women guests have been allowed to enter using the front door and to be nominated as members.
John Dufresne (born January 30, 1948) is an American author of French Canadian descent born in Worcester, Massachusetts.
 He graduated from Worcester State College in 1970 and the University of Arkansas in 1984.
  He is a professor in the Master of Fine Arts Creative Writing program of the English Department at Florida International University.
  In 2012, he won a John Simon Guggenheim Memorial Foundation Fellowship for his work.
Over the years, many members of the Fraternity of Phi Gamma Delta (also known as FIJI) have gained notability in their chosen fields.
 Examples include one U.S. President, four U.S. Vice Presidents, eleven Presidential Medal of Freedom recipients, five Medal of Honor recipients, six Pulitzer Prize winners, two Nobel Prize winners, over 80 competitors in the Olympic Games (of which at least 28 Fijis have won at least 37 medals), and at least six billionaires.
Robert Weil is the Editor-in-Chief and Publishing Director of Liveright, a newly relaunched division of W.W. Norton & Company.
 Over the course of his career, “Weil has published six National Book Award winners and three National Book Award finalists.
 He's published sixteen Pulitzer Prize winners (Michael Dirda, N. Scott Momaday, and Tina Rosenberg among them); seven Bancroft history prize winners; [and] seven MacArthur fellowship winners.”
David Alan Mamet ( ; born November 30, 1947) is an American playwright, essayist, screenwriter, and film director.
 As a playwright, Mamet has won a Pulitzer Prize and received Tony nominations for "Glengarry Glen Ross" (1984) and "Speed-the-Plow" (1988).
 Mamet first gained acclaim for a trio of off-Broadway plays in 1976, "The Duck Variations," "Sexual Perversity in Chicago," and "American Buffalo."
 His play "Race" opened on Broadway on December 6, 2009, and his play "The Penitent" previewed off-Broadway on February 8, 2017.
James Foley (born December 28, 1953) is an American film director.
 His 1986 film "At Close Range" was entered into the 36th Berlin International Film Festival.
 Other films he has directed include "Glengarry Glen Ross", based on the both Pulitzer Prize and Tony Award winning play of the same name by David Mamet (actor Al Pacino received an Academy Award nomination for his performance in the film), and "The Chamber", based on the novel of the same name by best-selling author John Grisham.
Smartish Pace is a non-profit, independent literary journal based in Baltimore, Maryland, USA.
 "Smartish Pace" was founded in 1999 by Stephen Reichert who was a University of Maryland School of Law student at the time.
 The name, "Smartish Pace", originates from a tort case in which a horse carriage, which was travelling at a smartish pace, ran over and killed a donkey.
 "Smartish Pace" has published poems by the following Pulitzer Prize winners: Natasha Trethewey, Claudia Emerson, Ted Kooser, Paul Muldoon, Yusef Komunyakaa, Carl Dennis, Stephen Dunn, Henry Taylor, Mary Oliver, Maxine Kumin, and Anthony Hecht.
 When referencing places Pulitzer Prize winner Claudia Emerson had published, "Newsweek" called the journal "obscure".
Glengarry Glen Ross is a play by David Mamet that won the Pulitzer Prize in 1984.
 The play shows parts of two days in the lives of four desperate Chicago real estate agents who are prepared to engage in any number of unethical, illegal acts—from lies and flattery to bribery, threats, intimidation and burglary—to sell undesirable real estate to unwitting prospective buyers.
 It is based on Mamet's experience having previously worked in a similar office.
Trident Media Group is a literary agency in New York.
 It represent major authors such as Deepak Chopra, Frank Herbert, among many others.
 Among the agency’s clients are Pulitzer Prize winners, National Book Award winners, and winners of various other literary prizes.
The Pulitzer Prize for Breaking News Photography is one of the American Pulitzer Prizes annually awarded for journalism.
 From 2000 it has used the "breaking news" name but it is considered a continuation of the Pulitzer Prize for Spot News Photography, which was awarded from 1968 to 1999.
 Prior to 1968, a single Prize was awarded for photojournalism, the Pulitzer Prize for Photography, which was replaced in that year by Pulitzer Prize for Spot News Photography and Pulitzer Prize for Feature Photography.