Question: Norberto Martin was the hitting coach for th team in which league?

Context paragraphs:
Howard Johnson (baseball): Howard Michael Johnson (born November 29, 1960), nicknamed HoJo, is a former Major League Baseball switch hitting third baseman.  He is best known for his career in Major League Baseball, where he played for the Detroit Tigers, New York Mets, Colorado Rockies and Chicago Cubs from 1982 to 1995.  He is third on the Mets' all-time lists for home runs, runs batted in, doubles, and stolen bases.  He also played for the Rockland Boulders of the Canadian-American Association of Professional Baseball.  On July 13, 2007, he was promoted from his position as the Mets' first base coach to their hitting coach which he held until the end of the 2010 season.  From 2014 to June 2015, he was the hitting coach of the Seattle Mariners after starting 2013 as the batting instructor for the Tacoma Rainiers, the Mariners' Triple-A affiliate.

Valentino Pascucci: Valentino Martin Pascucci (born November 17, 1978 in Bellflower, California) is a retired professional baseball player who played parts of two major league seasons with the Montreal Expos and New York Mets.  He batted and threw right-handed.  In 2014, he transitioned to the role of hitting coach for the Mets Single A affiliate, the Savannah Sand Gnats.  In 2016, he was named the hitting coach for the St. Lucie Mets.

Alan Zinter: Alan Michael Zinter (born May 19, 1968) is a former professional baseball player.  He played in Major League Baseball in 2002 and 2004 with the Houston Astros and the Arizona Diamondbacks, and played in Nippon Professional Baseball in 1999 with the Seibu Lions.  He served as the minor league hitting coordinator for the Cleveland Indians, the assistant hitting coach for the Astros, and was former the hitting coach of the San Diego Padres.

Norberto Martin: Norberto Edonal "Paco" Martin McDonald (born December 10, 1966) is a former professional baseball second baseman.  He played all or part of seven seasons in Major League Baseball from 1993 to 1999.  He made his major league debut on September 20, 1993 for the Chicago White Sox.  After his playing career, he became an instructor at the Academy of Pro Players in New Jersey, where he taught for a few years.  He served as the hitting coach for the Helena Brewers in 2004 and from 2007 to 2008; currently, Martin serves in the same capacity for the Asheville Tourists, the Class A affiliate of the Colorado Rockies.

Rick Eckstein: Rick H. Eckstein (born March 4, 1973) was a hitting coach for the Kentucky Wildcats baseball team.  Formerly he was an advanced scout and assistant hitting coach for the Los Angeles Angels of Anaheim.  He is the former hitting coach for the Washington Nationals of Major League Baseball.  Eckstein took over as the hitting coach in September 2008, after serving as the Columbus Clippers hitting coach.  He also was the hitting coach on the United States national baseball team in the 2008 Olympics.  Eckstein is an alumnus of the University of Florida.  He is the older brother of former major leaguer David Eckstein.

José Castro (baseball): José Castro (born May 5, 1958, at Havana, Cuba) is a coach in Major League Baseball who will spend 2015 as assisting hitting coach of the Atlanta Braves.  He was previously the hitting coach of the Seattle Mariners for part of the 2008 season and the quality assurance coach of the 2014 Chicago Cubs.  A former minor league infielder who played for 14 seasons (1977–1990) without reaching the Majors, Castro also spent part of the 2010 season as the manager of the Tacoma Rainiers, the Mariners' Triple-A affiliate.

Rudy Jaramillo: Rudolpho "Rudy" Jaramillo [ha-dah-MEE-yoh] (born September 20, 1950) is former professional baseball coach and player.  Jaramillo graduated from Dallas' Sunset High School in 1970 and attended the University of Texas at Austin.  He is best known for being a hitting coach at the major league level, most recently for the Chicago Cubs.  During his time with the Texas Rangers, Jaramillo was the first individual in Rangers history to serve more than eight seasons on their major league coaching staff.  He served as the Rangers' major league hitting coach for 15 seasons, from 1995 to 2009.  Jaramillo also had the longest tenure with one team as a hitting coach in Major League Baseball (MLB).  Jaramillo has been credited for the development of players such as Jeff Bagwell, Juan González, Adrian Gonzalez, Iván Rodríguez, Mark Teixeira, and Michael Young, among others.

Helena Brewers: The Helena Brewers are a Minor League Baseball team in the Pioneer League and are the Advanced Rookie affiliate of the Milwaukee Brewers.  They are located in Helena, Montana.  The team plays their home games at Kindrick Legion Field; built in 1939, the park currently holds 2,010 people.

Hiroshi Yagi: Hiroshi Yagi (八木 裕 , born June 8, 1965 in Tamano, Okayama, Japan) is a retired Japanese baseball player for the Hanshin Tigers.  He was an All-Star in 1990 and a member of the Tigers' 2003 championship team.  In the later years of his career, he was known as the team's "God of Pinch Hitting".  After retiring at the end of the 2004 season, he spent some time in the media before becoming a hitting coach for Hanshin in 2009.  He was named as the hitting coach for the club's second team for the 2015 season.

Jack Maloof: Jack Maloof (born October 12, 1948) is a former minor league baseball player and Major League Hitting Coach for the Kansas City Royals.  Maloof was an 8-year player in the minor leagues with a career average of .303, hitting .300 or better five times.  In 1979, he played his final season for the Seibu Lions in Japan before becoming a manager in the minors and eventually a hitting coach in the majors.  During his playing career, he led his league four times in walks, three times in OBP and once in average.

Supporting paragraphs: Norberto Martin Helena Brewers
Answer: Pioneer League