Question: The 2015 San Diego Padres season had a general manager of which former Texas Rangers assistant GM?

Context paragraphs:
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.

Ramón Vázquez: Ramón Luis Vázquez (born August 21, 1976) is a Puerto Rican former professional baseball infielder and current coach for the San Diego Padres.  Vázquez played in Major League Baseball (MLB) for the Seattle Mariners (2001), San Diego Padres (2002-2004), Boston Red Sox (2005), Cleveland Indians (2005-2006), Texas Rangers (2007-2008), and Pittsburgh Pirates (2009).  He bats left-handed and throws right-handed.  In 2014, it was announced that Vazquez would become the hitting coach for the Gulf Coast League Astros under manager Marty Malloy.

A. J. Preller: A. J. Preller is the general manager of the San Diego Padres Major League Baseball club.  He was hired by the Padres on August 5, 2014 while serving as the assistant GM for the Texas Rangers.

David Morway: David Morway was the former General Manager of the Indiana Pacers of the National Basketball Association,and is currently the Assistant General Manager of the Milwaukee Bucks.  He had also been an assistant general manager with the San Diego Padres from 1985 to 1988.  He is a 1982 graduate of the University of Arizona with a law degree from the University of San Diego.  He is currently being considered for a front office position with the Sacramento Kings.

Julius Matos: Julius Matos (born December 12, 1974) is a former Major League Baseball second baseman.  He played in 76 games for the San Diego Padres during the 2002 San Diego Padres season and 28 games for the Kansas City Royals during the 2003 Kansas City Royals season.

Victor Bernal: Victor Hugo Bernal (October 6, 1953 – September 2, 2006) was a Major League Baseball pitcher who played for one season.  Bernal was drafted by the San Diego Padres in the 6th round of the 1975 Major League Baseball Draft.  He played for the San Diego Padres for 15 games during the 1977 San Diego Padres season.

Jed Hoyer: Jed D. Hoyer (born December 7, 1973), is the executive vice-president and general manager of the Chicago Cubs.  He has been the general manager of the San Diego Padres and the assistant general manager of the Boston Red Sox.  He joined the Red Sox in 2002, after the ownership of John W. Henry, Tom Werner, and Larry Lucchino took over the team from John Harrington.  He worked under the title of assistant to the general manager until December 2005.  He then was given the title of assistant general manager.  Hoyer briefly served as co-general manager of the Red Sox from December 12, 2005 to January 19, 2006 and then returning to his previous job of assistant general manager.  In November 2003, he accompanied general manager Theo Epstein to Arizona to persuade pitcher Curt Schilling to accept a trade to the Red Sox, spending Thanksgiving at Schilling's home in what was eventually a successful effort.

Randy Byers: Randell Parker Byers (born October 2, 1964) is a former Major League Baseball left fielder who played for two seasons.  He played for the San Diego Padres for ten games during the 1987 San Diego Padres season and 11 games during the 1988 San Diego Padres season.

2006 San Diego Padres season: The 2006 San Diego Padres season captured their second consecutive National League West crown, with a record of 88-74, and for the first time in franchise history back-to-back postseason appearances, and three consecutive winning seasons.  Although the Padres final record equaled that of the Los Angeles Dodgers, the Padres record of 13-5 against the Dodgers awarded them the official division title.  The 2006 season also marked the end of Bruce Bochy's tenure as manager of the team, after 24 seasons overall, 12 seasons as manager (1995–2006), winning 4 division titles (1996, 1998, 2005, 2006).  The Padres were eliminated in the 2006 National League Division Series by the eventual World Champion St. Louis Cardinals losing 3-1.

2005 San Diego Padres season: The 2005 San Diego Padres season was the 37th season for the San Diego Padres.  The 2005 team is noted as having the weakest record among division champions, finishing 82-80, the worst ever in a non-strike year.  The NL West was weak in 2005, with all teams finishing below the .500 mark except the San Diego Padres, who only finished 2 games above the .500 mark.  The closest team, the Arizona Diamondbacks, were 5 games back.  Three teams in the Eastern Division finished with better records than San Diego but failed to qualify for the playoffs, such as the Phillies, who won 88 games and all swept the season series with the Padres.  There had been some speculation that the Padres would be the first team in MLB history to win a division and finish below .500, but their victory over the Los Angeles Dodgers on September 30 gave them their 81st victory, guaranteeing a split record.  They would be swept by the St. Louis Cardinals in the 2005 NLDS.

Supporting paragraphs: 2015 San Diego Padres season A. J. Preller
Answer: A. J. Preller