Green played baseball at Canyon High School in Anaheim, California. As a high school sophomore, Green batted.430 with eight doubles and 22 RBI. In his junior season, he batted.455 with three home runs, 30 RBI and 14 stolen bases, a performance he duplicated as a senior when he batted.453 with four home runs, 22 RBI, and 14 stolen bases. Green earned first team honors from the California Interscholastic Federation and the Orange County Register. After his senior season, he was the 14th-round draft choice of the San Diego Padres, but he opted to attend the University of Southern California instead. Green also experienced success with the 2005 U.S. Junior National Team. He batted.412 with six RBI and two stolen bases at the 2005 COPABE "AAA" Pan Am Junior Championships in Villahermosa, Mexico.
College career
Green started every game for the USC Trojans as a true freshman in 2007. He batted.316 with two home runs, 14 doubles, 24 RBI and six stolen bases. Green collected several postseason honors, including Pac-10 Conference Co-Freshman of the Year. As a sophomore in 2008, Green batted.390 with nine home runs, 46 RBI, and 10 stolen bases. He was named a member of Baseball America's All-America third team and also earned All-Pacific-10 Conference honors. Before Green's junior season, Baseball America rated him as the third best college prospect in the nation. However, Green's junior season began slowly, as he was batting only.234 after 13 games. However, he turned in an impressive performance by season's end, batting.374 overall, with four home runs, 32 RBI, and 16 stolen bases in 24 attempts. He led the Trojans with a.435 on-base percentage and 26 multi-hit games. In 2007, Green played collegiate summer baseball in the Cape Cod Baseball League for the Yarmouth-Dennis Red Sox. He returned to the CCBL in 2008 to play for the Chatham Anglers, and was honored by the league as its top pro prospect. He was among the league leaders in most offensive categories but struggled defensively, committing 17 errors in 41 games.
2009 Draft
As the 2009 baseball draft approached, Green was very highly regarded among experts, who expected him to be drafted high in the first round. He was drafted by the Oakland Athletics in the first round of the 2009 Major League Baseball Draft as the 13th overall selection as a shortstop. Although some scouts had projected him as a future third baseman, both Green and the Athletics stated a desire for him to remain at shortstop. Green was advised by high-profile sports agentScott Boras. He signed a contract with a signing bonus of $2.75 million on August 17, 2009 just minutes before the deadline to sign draft picks passed.
Professional career
Oakland Athletics
Green played in five minor league games during the 2009 season, all at Single-A Stockton. Starting the 2010 season, he was rated as Oakland's third best prospect according to Baseball America and was a non-roster invitee to the A's spring training camp as part of his contract. He spent the entire season at Stockton and was selected for the Futures Games. He played in the Arizona Fall League in 2010. For the 2011 season, Green was moved to the outfield and played for the AA Midland RockHounds with a minor stint in the AAA playoffs. He made his MLB debut on July 8, 2013, starting at second base. He went 0-for-3 and struck out twice. He appeared in five games with the Athletics and did not record a hit.
Green was traded to the Los Angeles Angels of Anaheim on July 30, 2013 in exchange for Alberto Callaspo. Green tallied his first two major league hits in his Angels debut on August 6. During the 2014 season Green went to bat for the Angels 99 times, compiling a.273 batting average, hitting 1 home run, and driving in 11 RBIs. During the 2015 season Green was shuffled between the Angels and their triple-A affiliate Salt Lake Bees. In his most recent stint from July 19–24 he only had one at-bat, in which he flew out. He was optioned back to Salt Lake on July 24. The Angels designated Green for assignment at the end of the 2015 season, and outrighted him to the minor leagues.
San Francisco Giants
On November 30, 2015, Green signed a minor league deal with the Giants. Green began the 2016 season with the Sacramento River Cats of the Class AAAPacific Coast League, and was promoted to the major leagues on June 30. The Giants designated him for assignment on July 28, and outrighted him to Sacramento.
