Question: What is the nickname of the first baseman who was traded by the Padres in 2010?

full_context: Document 1: Casey Kelly: Casey Patrick Kelly (born October 4, 1989) is an American professional baseball pitcher in the San Francisco Giants organization. He was a first-round draft choice, 30th overall, in the 2008 Major League Baseball Draft by the Boston Red Sox. He was the top minor league prospect in the Red Sox organization when he was acquired by the San Diego Padres after the 2010 season, along with three other prospects, in exchange for All-Star player Adrian Gonzalez. He made his major league debut with San Diego in 2012, but underwent Tommy John surgery the following year. He was traded to Atlanta after the 2015 season.
Document 2: Josh Hader: Josh Ronald Hader (born April 7, 1994) is an American professional baseball pitcher for the Milwaukee Brewers of Major League Baseball (MLB). The Baltimore Orioles selected him in the 2012 MLB draft. He was traded twice before joining the Brewers in 2015. Hader played for the United States national baseball team in the Pan American Games in 2015, and appeared in the All-Star Futures Game in 2016. He made his MLB debut in 2017.
Document 3: 2015 San Diego Padres season: The 2015 San Diego Padres season was their 47th season in MLB, and their 12th at Petco Park. General Manager A. J. Preller had a busy offseason, acquiring a new starting outfield in Matt Kemp, Justin Upton, and Wil Myers, while adding to an already strong bullpen with All-Star closer Craig Kimbrel. The Padres also signed free agent starting pitcher James Shields. San Diego traded away seven of its top 11 prospects, as rated by Baseball America entering the offseason.
Document 4: Pedro Guerrero (baseball): Pedro Guerrero (born June 29, 1956) is a Dominican former professional baseball player. He played all or part of fifteen seasons in Major League Baseball from 1978 to 1992 with the Los Angeles Dodgers and St. Louis Cardinals. Writer Bill James called Guerrero "the best hitter God has made in a long time."
Document 5: Alex Rodriguez: Alexander Emmanuel Rodriguez (born July 27, 1975), nicknamed "A-Rod", is a Dominican-American former professional baseball shortstop and third baseman. He played 22 seasons in Major League Baseball (MLB) for the Seattle Mariners, Texas Rangers, and New York Yankees. Rodriguez was one of the sport's most highly touted prospects and is considered one of the greatest baseball players of all time. Rodriguez amassed a .297 batting average, 696 home runs, over 2,000 runs batted in (RBI), over 2,000 runs scored, and over 3,000 hits. He is a 14-time All-Star and won three American League (AL) Most Valuable Player (MVP) Awards, ten Silver Slugger Awards, and two Gold Glove Awards. Rodríguez is the career record holder for grand slams with 25. However, he led a highly controversial career due to signing two of the most lucrative sports contracts in history while incurring criticism from the media for his behavior and use of illegal performance-enhancing drugs.
Document 6: Sean Gilmartin: Sean Patrick Gilmartin (born May 8, 1990) is an American professional baseball pitcher in the St. Louis Cardinals organization. He previously played for the New York Mets. Gilmartin was the 28th overall selection in the 2011 Major League Baseball draft by the Atlanta Braves. Prior to beginning his professional career, Gilmartin attended Florida State University, and was an All-American pitcher for the Seminoles baseball team.
Document 7: Anthony Rizzo: Anthony Vincent Rizzo (born August 8, 1989) is an American professional baseball first baseman for the Chicago Cubs of Major League Baseball (MLB). He is a three-time All-Star. Rizzo was selected by the Boston Red Sox in the sixth round of the 2007 MLB draft and became a top minor league prospect in the Red Sox organization. He was traded to the San Diego Padres after the 2010 season along with three other prospects in exchange for All-Star first baseman Adrian Gonzalez. After being traded to the Cubs in 2012, he developed into an All-Star player.
Document 8: Andrew Miller (baseball): Andrew Mark Miller (born May 21, 1985) is an American professional baseball relief pitcher for the Cleveland Indians of Major League Baseball (MLB). He previously played for the Detroit Tigers, Florida Marlins, Boston Red Sox, Baltimore Orioles, and New York Yankees. In 2017, he earned his first major championship in the World Baseball Classic as a member of the United States national baseball team. Miller attended the University of North Carolina (UNC) at Chapel Hill and played college baseball for the Tar Heels before the Detroit Tigers drafted him. After beginning his MLB career primarily as a starting pitcher, Miller converted to full-time relief in 2012, serving in middle relief, setup and closer roles. He has pitched in three playoffs while his clubs have appeared in five. At UNC, he won the "Baseball America" College Player of the Year and Roger Clemens Awards. In his Major League career, he has been an All-Star selection, and has won the American League (AL) Reliever of the Year and the AL Championship Series Most Valuable Player Awards (ALCS MVP).
Document 9: Sean Rodriguez: Sean John Rodriguez (born April 26, 1985) is an American professional baseball utility player for the Pittsburgh Pirates of Major League Baseball (MLB). He previously played for the Los Angeles Angels of Anaheim, Tampa Bay Rays, and Atlanta Braves. While primarily a second baseman, Rodriguez has started at every position in his MLB career except for catcher and pitcher.
Document 10: Manny Ramirez: Manuel Arístides Ramírez Onelcida (born May 30, 1972) is a Dominican-American professional baseball outfielder for the Kōchi Fighting Dogs of the Shikoku Island League Plus. He played in Major League Baseball (MLB) for parts of 19 seasons. He played with the Cleveland Indians, Boston Red Sox, Los Angeles Dodgers, Chicago White Sox, and Tampa Bay Rays before playing one season in the Chinese Professional Baseball League. Ramirez is recognized for having had great batting skill and power. He was a nine-time Silver Slugger and was one of 25 players to hit 500 career home runs. His 21 grand slams are third all-time, and his 29 postseason home runs are the most in MLB history. He appeared in 12 All-Star Games, with a streak of eleven consecutive games beginning in 1998 that included every season that he played with the Red Sox.
Document 11: Tony Gwynn: Anthony Keith Gwynn Sr. (May 9, 1960 – June 16, 2014), nicknamed "Mr. Padre", was an American professional baseball right fielder who played 20 seasons (1982–2001) in Major League Baseball (MLB) for the San Diego Padres. The left-handed hitting Gwynn won eight batting titles in his career, tied for the most in National League (NL) history. He is considered one of the best and most consistent hitters in baseball history. He had a .338 career batting average, never hitting below .309 in any full season. Gwynn was a 15-time All-Star, recognized for his skills both on offense and defense with seven Silver Slugger Awards and five Gold Glove Awards. He was the rare player in his era that stayed with a single team his entire career, and he played in the only two World Series appearances in San Diego's franchise history. He was inducted into the Baseball Hall of Fame in 2007, his first year of eligibility.
Document 12: Adam Dunn: Adam Troy Dunn (born November 9, 1979), nicknamed "Big Donkey", is an American former professional baseball left fielder and first baseman. He played in Major League Baseball (MLB) for the Cincinnati Reds, Arizona Diamondbacks, Washington Nationals, Chicago White Sox, and Oakland Athletics. He is a two-time MLB All-Star.
Document 13: Evan Longoria: Evan Michael Longoria (born October 7, 1985), nicknamed Longo, is an American professional baseball player. He played for the Long Beach State University baseball team, where he was the 2005 Cape Cod League MVP, and the 2006 Big West Co-Player of the Year. He was drafted by the Rays in the first round as the third pick overall in the 2006 MLB draft. After two full seasons in the minors, he made his major league debut for the Rays in , and was named to the American League team for the 2008 MLB All Star Game. Longoria was also named the 2008 American League Rookie of the Year on November 10. Longoria has also made the All-Star team three times, being selected from 2008 to 2010. Longoria had one of the biggest hits in Rays history when he hit a walk off home run in extra innings of the last game of the 2011 season, snapping a tie with the Red Sox in the race for the American League wildcard spot and sending his team into the postseason.
Document 14: John Smoltz: John Andrew Smoltz (born May 15, 1967), nicknamed "Smoltzie" and "Marmaduke," is an American former baseball pitcher who played 22 seasons in Major League Baseball from 1988 to 2009, all but the last year with the Atlanta Braves. An eight-time All-Star, Smoltz was part of a celebrated trio of starting pitchers, along with Greg Maddux and Tom Glavine, who propelled Atlanta to perennial pennant contention in the 1990s, highlighted by a championship in the 1995 World Series. He won the National League (NL) Cy Young Award in 1996 after posting a record of 24–8, equaling the most victories by an NL pitcher since 1972. Though predominantly known as a starter, Smoltz was converted to a reliever in 2001 after his recovery from Tommy John surgery, and spent four years as the team's closer before returning to a starting role. In 2002, he set the NL record with 55 saves and became only the second pitcher in history (joining Dennis Eckersley) to record both a 20-win season and a 50-save season. He is the only pitcher in major league history to record both 200 wins and 150 saves.
Document 15: Adrian Gonzalez: Adrián González Savín (born May 8, 1982), also known by his nicknames A-Gon and Titán, is an American-born Mexican professional baseball first baseman for the Los Angeles Dodgers of Major League Baseball (MLB).
ground_truth: A-Gon