Alex Anthopoulos (born May 25, 1977), nicknamed by his initials "A.A.", is a Canadian professional baseball executive, currently serving as general manager and president of baseball operations for the Atlanta Braves, which won the 2021 World Series.

Anthopoulos got his start in professional baseball with the Montreal Expos organization in 2000. He was the senior vice president of baseball operations and general manager of the Toronto Blue Jays of Major League Baseball (MLB) from 2010 to 2015, for whom he began as a scouting coordinator in 2003. In 2015, he was named the Sporting News Executive of the Year after the Blue Jays advanced to the playoffs for the first time since 1993, reaching the American League Championship Series (ALCS). However, his term with the Blue Jays ended on October 29, 2015, when he declined a five-year contract extension. He served for two years as vice president of baseball operations for the Los Angeles Dodgers.

In 2000, Anthopoulos was hired by the Montreal Expos as an unpaid intern, and worked sorting players' fan mail. After working in the mail room he would sit with the scouts at games and take notes, and was eventually moved to a scouting internship in Florida. In 2002, he was promoted to the Expos' scouting coordinator. He would leave the team at the end of the 2003 season, while working as the assistant scouting director.

Anthopoulos joined the Toronto Blue Jays in late 2003, as their scouting coordinator. After the 2005 season, he was promoted to assistant general manager (AGM) under J. P. Ricciardi. While he was serving as AGM, the Blue Jays acquired José Bautista and Edwin Encarnación, each of whom unexpectedly experienced a career renaissance, establishing new levels of production and consistency that were key components of the Blue Jays' offense during Anthopoulos' time as GM. Bautista was the MLB home run leader from 2010–11, and, in each year from 2010 to 2015, was an All-Star and hit at least 27 home runs. Encarnacion hit at least 34 home runs each year from 2012 to 2015.

Anthopoulos became the Blue Jays' general manager in October 2009, after Ricciardi was fired. He began his tenure as the general manager by playing a major role in one of the biggest trades in Blue Jays history, "The Doc Deal". In the deal, Anthopoulos traded Roy Halladay to the Philadelphia Phillies for Kyle Drabek, Michael Taylor, and Travis d'Arnaud.

Anthopoulos was also instrumental in doubling the size of the Blue Jays' scouting department, growing it to 54 scouts in various positions. The 2010 draft, the first with Anthopoulos in charge, resulted in a highly successful draft with a number of players picked eventually enjoying significant playing careers in the majors, including Aaron Sanchez and Noah Syndergaard.

The Jays' first season with Anthopoulos at the helm resulted in an 85–77 record, good for fourth place in the American League (AL) East division. The club hit a franchise-record 257 home runs, the third-highest single-season total by any club in Major League history.

In January 2011, Anthopoulos completed a blockbuster trade by shipping another long-time face of the Blue Jays franchise, Vernon Wells, and the remaining US$86 million over the next four years to the Los Angeles Angels for catcher Mike Napoli and outfielder Juan Rivera. He then sent Napoli to the Texas Rangers for pitcher Frank Francisco, and later traded Rivera to the Los Angeles Dodgers for a player to be named later or cash considerations. Due to the debacle of the Wells deal, Anthopoulos instituted a “five year policy” on player contracts, while also excluding performance bonuses, incentives, player options, no-trade clauses or opt-out clauses, in making these deals much more team friendly.