Question: What star of "The Thing with Two Heads" also played football?

full_context: Document 1: Rosey Grier: Roosevelt Grier (born July 14, 1932) is an American actor, singer, Protestant minister, and former professional American football player. He was a notable college football player for The Pennsylvania State University who earned a retrospective place in the National Collegiate Athletic Association 100th anniversary list of 100 most influential student athletes. As a professional player, Grier was a member of the New York Giants and the original Fearsome Foursome of the Los Angeles Rams. He played in the Pro Bowl twice.
Document 2: George Gipp: George Gipp (February 18, 1895 – December 14, 1920), nicknamed "The Gipper", was a college football player who played for the University of Notre Dame. Gipp was selected as Notre Dame's first Walter Camp All-American. Gipp played several positions, particularly halfback, quarterback, and punter.
Document 3: Frank Gifford: Francis Newton "Frank" Gifford (August 16, 1930 – August 9, 2015) was an American football player and television sports commentator. After a 12-year playing career as a halfback and flanker for the New York Giants of the National Football League (NFL), he was a play-by-play announcer and commentator for 27 years on ABC's "Monday Night Football".
Document 4: Parts: The Clonus Horror: Parts: The Clonus Horror, also known as Clonus, is a 1979 science fiction horror film about an isolated community in a remote desert area, where clones are bred to serve as a source of replacement organs for the wealthy and powerful. It was a Myrl Schreibman production, executive produced by Walter Fiveson and produced by Schreibman and Robert Fiveson, directed by Robert Fiveson, and stars Dick Sargent as the laboratory director and Peter Graves as a corrupt politician. The production cost of the movie was $257,000. Although they did not feature in any scenes together, the following year Graves and Frank Ashmore would appear together in the comedy "Flying High!".
Document 5: Forrest Gregg: Alvis Forrest Gregg (born October 18, 1933) is a former American football player and coach in the National Football League (NFL), the Canadian Football League and the NCAA. A Pro Football Hall of Fame offensive lineman for sixteen seasons, he was a part of six NFL championships, five of them with the Green Bay Packers before closing out his tenure with the Dallas Cowboys with a win in Super Bowl VI. Gregg was later the head coach of three NFL teams (Cleveland Browns, Cincinnati Bengals, and the Packers), as well as two Canadian Football League teams (Toronto Argonauts and Shreveport Pirates).
Document 6: Something Evil: Something Evil is a 1972 horror television movie starring Sandy Dennis, Darren McGavin and Ralph Bellamy. Directed by Steven Spielberg, the screenplay was written by Robert Clouse.
Document 7: Garrison Hearst: Gerard Garrison Hearst (born January 4, 1971) is a former running back in the National Football League (NFL) for ten seasons. He played college football for the University of Georgia, and was recognized as an All-American. A first-round pick by the Phoenix Cardinals, he also played professionally for the Cincinnati Bengals, San Francisco 49ers and Denver Broncos of the NFL. He ran for 1,000 yards or more in four different seasons. He was named the NFL Comeback Player of the Year Award in 2001.
Document 8: Swamp Thing (film): Swamp Thing is a 1982 American superhero science-fiction horror film written and directed by Wes Craven, based on the DC Comics (later Vertigo Comics) character of the same name created by Len Wein and Bernie Wrightson. It tells the story of scientist Alec Holland (Ray Wise) who becomes transformed into the monster Swamp Thing (Dick Durock) through laboratory sabotage orchestrated by the evil Anton Arcane (Louis Jourdan). Later, he helps a woman named Alice Cable (Adrienne Barbeau) and battles the man responsible for it all, the ruthless Arcane.
Document 9: Greg Larson: Gregory Kenneth Larson (born November 15, 1939) is a former American football center in the National Football League (NFL) for the New York Giants. He played college football at the University of Minnesota and was drafted in the sixth round of the 1961 NFL Draft. Larson was also selected in the eleventh round of the 1961 AFL Draft by the San Diego Chargers.
Document 10: The Thing from Another World: The Thing from Another World is a 1951 American black-and-white science fiction-horror film, directed by Christian Nyby, produced by Edward Lasker for Howard Hawks' Winchester Pictures Corporation, and released by RKO Pictures. The film stars Kenneth Tobey, Margaret Sheridan, Robert Cornthwaite, and Douglas Spencer. James Arness plays The Thing, but he is difficult to recognize in costume and makeup due to both low lighting and other effects used to obscure his features. The film is based on the 1938 novella "Who Goes There?" by John W. Campbell (writing under the pseudonym of Don A. Stuart).
Document 11: The Thing with Two Heads: The Thing with Two Heads is a 1972 American science fiction film directed by Lee Frost. The film stars Ray Milland, Rosey Grier, Don Marshall, Roger Perry, Kathy Baumann, and Chelsea Brown.
Document 12: Two (1964 film): Two: A Film Fable is a 1964 black-and-white short film directed by the Indian director Satyajit Ray. The film was made under the banner of Esso World Theater at the request of a non-profit American public broadcasting television, PBS. It was made as part of a trilogy of short films from India. The other two films in the trilogy featured Indian Sitar player, Pandit Ravi Shankar and a Ballet troupe from Mumbai, then known as "Bombay". Ray, who worked prominently for Bengali cinema, was requested to make a film in English language with a Bengali setting, however Ray being an admirer of silent film decided to make a film without any dialogue as a tribute to the genre.
Document 13: Head (film): Head is a 1968 American satirical musical adventure film written by Jack Nicholson and Bob Rafelson, directed by Rafelson, starring television rock group The Monkees (Davy Jones, Micky Dolenz, Peter Tork and Michael Nesmith), and distributed by Columbia Pictures.
Document 14: Dick Butkus: Richard Marvin Butkus (born December 9, 1942) is a former American football player, sports commentator, and actor. He played professional football as a linebacker for the Chicago Bears of the National Football League (NFL) from 1965 to 1972. Through nine NFL seasons, he was invited to eight Pro Bowls, named a first-team All-Pro six times, and was twice recognized by his peers as the NFL's Defensive Player of the Year. Renowned as a fierce, violent tackler and for the relentless effort with which he played, Butkus is widely regarded as one of the greatest and most intimidating linebackers in pro football history.
Document 15: Shirley Thompson vs. the Aliens: Shirley Thompson vs. the Aliens is a 1972 film directed by Jim Sharman and starring Jane Harders and Helmut Bakaitis. It is the first feature-length film from Sharman, who subsequently directed "The Rocky Horror Picture Show" (1975).
ground_truth: Rosey Grier