He joined the United States Navy in 1967[7] to serve in the Vietnam War, but was disabled by a training injury at Officer Candidate School in Newport.

Democrat Mrazek was first elected in 1982 to the 98th United States Congress, defeating John LeBoutillier,[10] a one-term Conservative Republican Congressman in the 3rd district.

Edwards Substitute Amendment to Title II, HR 5052 regarding Nicaragua was passed in June 1986; it limited the Reagan Administration's use of $100,000,000 Congress had approved for military assistance to Contras seeking to overthrow the Sandinista National Liberation Front.

Since its passage, many of the Amerasians brought to the United States by the bill have found success after graduation from college, as teachers, entrepreneurs, and business people.

In April, 1988, he inserted an amendment into an appropriations bill that prohibited federal funds from being used to plan and design a needed interchange near the 542-acre (2.19 km2) tract of land.

In the contentious battle over the legislation, Donald Hodel, President Ronald Reagan's Secretary of the Interior, launched personal attacks on Mrazek and Andrews, accusing them of "playing politics" with the battlefield.

While the proposal was being considered, the "Mrazek Amendment" generated an intense lobbying campaign against its passage, led on behalf of the major film studios by Jack Valenti, President of the Motion Picture Association.

"[20] The legislation was backed by many members of Hollywood's creative community, including actors Burt Lancaster and James Stewart, directors Steven Spielberg and George Lucas, all of whom wanted to see the integrity of their work preserved without alteration.

First introduced by Mrazek in 1986, the proposed law was the subject of several years of contentious debate between its author and members of the Alaska Congressional delegation, including Representative Don Young (R-AK).

[22] Mrazek's landmark conservation law revoked the artificially high timber cutting targets, protecting over 2,000,000 acres (8,100 km2) of Tongass's old-growth forest and watershed acreage, and mandated broad buffers for all salmon and resident fishing streams.

[25] Since retiring from Congress, Mrazek has published twelve books, including eight novels, and four works of non-fiction; he also wrote the screenplay for the 2016 feature film, The Congressman.

[28] The film stars Treat Williams, Elizabeth Marvel, Ryan Merriman, George Hamilton, Jayne Atkinson, Fritz Weaver, and Marshall Bell.