Frank Wren is a former Major League Baseball executive who has had a long and successful career in the sport. He began his career as a player, but quickly transitioned to coaching and front office positions. Wren worked for several different teams over the years, including the Montreal Expos, the Baltimore Orioles, the Florida Marlins, the Atlanta Braves, and the Boston Red Sox.

Wren's first job in baseball was as a scout for the Montreal Expos in the early 1980s. He quickly moved up the ranks, becoming the team's director of player development in 1985. He then spent several years as a coach and scout for the Baltimore Orioles before joining the Florida Marlins as their assistant general manager in 1991.

Wren played a key role in building the Marlins' World Series-winning team in 1997. He was responsible for acquiring several key players, including Kevin Brown, Moises Alou, and Bobby Bonilla. After the Marlins won the championship, Wren left the team to become the general manager of the Baltimore Orioles.

Wren's tenure with the Orioles was short-lived, as he was fired after just one season. He then joined the Atlanta Braves as their assistant general manager in 1999. Wren spent the next several years working his way up the Braves' front office, eventually becoming the team's general manager in 2007.

During his time with the Braves, Wren oversaw a period of sustained success for the team. The Braves won the National League East division title in 2008 and 2009, and made the playoffs in five of Wren's seven seasons as general manager. Wren was also responsible for acquiring several key players, including Dan Uggla, Justin Upton, and B.J. Upton.

Despite his success with the Braves, Wren was fired in 2014 after the team missed the playoffs for the second straight year. He then joined the Boston Red Sox as a senior vice president, but was let go after just one season.

Overall, Wren's career in baseball has been marked by both success and controversy. He has been praised for his ability to build winning teams, but has also been criticized for some of his personnel decisions. Despite the ups and downs, Wren remains one of the most respected executives in the sport, and his contributions to the game will not be forgotten anytime soon.