Soon they became victims of the military draft of World War II and went into a steep decline. In 1943–44 NHL season the New York Rangers were so bad that Boucher came out of retirement for 15 games to play where he recorded 14 points; at age 42, he was the oldest position player ever to play in the NHL, a record he held until surpassed by Doug Harvey in 1968. The Rangers finished the 50 game season with only 6 wins. Between appearances in 1940 and 1972 they reached the Stanley Cup Finals only once. When Patrick retired, Frank took over as general manager. He got the Rangers into the playoffs in 1947–48 with his trade to get Buddy O'Connor and Frank Eddolls. He stepped down from coaching to concentrate on his manager's job and hired Lynn Patrick, Lester's son and an ex-teammate, to coach the Rangers, and Lynn came very close to winning the Stanley Cup in 1950, proving Boucher astute in hiring him as coach. But the Rangers were an aging team, and eroded. Lynn Patrick resigned to go to Boston, and neither Neil Colville nor Bill Cook, also former teammates of Boucher's, could get the Rangers into the playoffs. General John Kilpatrick, the Rangers' owner, thought about replacing Boucher, but he held off. During the 1945–46 season, Boucher became the first coach to use two goalies regularly. Alternating Charlie Rayner and Jim Henry every game, and later, every four to six minutes, he proved the usefulness of having two goalies. Frank went back behind the bench in 1953–54, but could not get the Rangers into the playoffs. He then hired Muzz Patrick, another son of Lester and ex-teammate, to coach the team, but the Rangers won only 17 games and missed the playoffs again. So General Kilpatrick had a talk with Frank and reluctantly expressed that Frank could not build the Rangers into a winner, and recommended Frank resign as general manager. Frank thought it over, realizing that it was better than being fired. He then typed his resignation and handed it in to the General, ending his 29-year association with the Rangers. He was inducted into the Hockey Hall of Fame in 1958. In 1998, he was ranked number 61 on "The Hockey News"' list of the 100 Greatest Hockey Players. His uniform number 7 hangs in the rafters of Madison Square Garden, although it was retired for a later Ranger, Rod Gilbert. In 1974, Boucher wrote "When the Rangers Were Young", a book about his experiences with the old-time Broadway Blueshirts, giving him one last moment of fame during his lifetime.