Philadelphia Phillies After his playing career ended, Green managed the
Huron Phillies of the
Class A-Short Season Northern League, in and the
Pulaski Phillies of the
Rookie-level Appalachian League in . Pulaski won the Appalachian League championship. In , he joined the Phillies'
front office as an assistant to
farm system director
Paul Owens. When Owens was promoted to general manager in June of , Green succeeded him as the Phils' director of player development. When Green was appointed to the position, he matter-of-factly stated: "I express my thoughts. I'm a screamer, a yeller, and a cusser. I never hold back." His difficult manner led to clashes with many of the team's star players, such as slugger
Greg Luzinski, shortstop
Larry Bowa, and catcher
Bob Boone. Titanic blows were exchanged between the 6 ft 5 in Green and 6 ft 6 in (1.98 m)
relief pitcher Ron Reed. Still, come October, it was Green manning the helm, guiding the Phillies to victory, in the
1980 World Series — the team’s
first World Series title in its 98-year history. In 1981, the team again made the postseason, by virtue of having won the East division, in the first half of the strike-split season; however, the Phillies lost to the
Montreal Expos in the
National League Division Series, 3 games to 2. Green hired a number of coaches and scouts away from the Phillies, such as
Lee Elia,
John Vukovich, and
Gordon Goldsberry. Green also made some trades with the Phillies, acquiring players such as Bowa,
Keith Moreland,
Dickie Noles, and
Ryne Sandberg. Green continued to build the Cubs between the and seasons. After acquiring left fielder
Gary Matthews and center fielder
Bob Dernier from Philadelphia, before the season, Green's Cubs became serious contenders for the first time in more than a decade. During the 1984 season, Green made a few more moves, most notably acquiring right-handed pitcher
Dennis Eckersley from the
Boston Red Sox for popular first baseman
Bill Buckner in late May, and sending Cubs' prospects
Mel Hall and
Joe Carter to the
Cleveland Indians for relief pitcher
George Frazier, backup
catcher Ron Hassey, and right-handed pitcher
Rick Sutcliffe, in mid-June. Sutcliffe went 16–1 with the Cubs that season to lead the Cubs to the
National League East title — their first postseason appearance of any kind since the
1945 World Series. Because Green neglected to renew waivers on Hall and Carter, the status of the trade was in doubt for a while, and the two did not play for a week. Green's first-year manager
Jim Frey won
NL Manager of the Year, Sutcliffe won the NL
Cy Young Award, and Sandberg won the
NL Most Valuable Player Award. Green was named
The Sporting News Executive of the Year. Green then won a power struggle within the Cubs front office; he was promoted to team president, replacing
Jim Finks, who resigned to take a job with the
New Orleans Saints of the
National Football League. As it turned out, this was the high point of Green's tenure in Chicago. The Cubs struggled in and , and fell to last place in 1987. After Green blasted the Cubs for quitting in 1987, manager
Gene Michael resigned over Labor Day weekend. Green himself left the Cubs in October 1987, citing "philosophical differences" with Tribune Company executives. Green also rebuilt the Cubs' farm system with Goldsberry, developing stars like
Shawon Dunston,
Greg Maddux,
Rafael Palmeiro,
Jamie Moyer, and
Mark Grace. The Cubs won a division title in .
New York Yankees After the season, the New York Yankees fired manager
Lou Piniella, replacing him with Green. The Yankees had slumped to fall out of the playoff race late in 1988, and team owner
George Steinbrenner wanted a manager who would be more of a disciplinarian with the players. With the
1989 Yankees, he was also under .500 at 56–65 (.463). Steinbrenner fired Green, in August 1989.
New York Mets In , the New York Mets hired Green as a scout. During the season, the Mets fired manager
Jeff Torborg, and hired Green for the position. During his tenure with the Mets, he was under .500 at 229–283 (.447).
Late career In , Green returned to the Phillies as a senior advisor to the general manager. He would remain with the Philadelphia organization, serving in various capacities, for the remainder of his life. Green's overall managerial record was 454–478, a .487 winning percentage. ==Managerial record==