Question: Olakunle "Kay" Banjo (born December 3, 1992) is an American soccer player who plays for the Pittsburgh Riverhounds in the United Soccer League (USL), formerly known as USL Pro, is a professional men's soccer league in the United States and Canada that began its inaugural season in what year?

Context paragraphs:
Pittsburgh Riverhounds: The Pittsburgh Riverhounds are an American professional soccer team based in Pittsburgh, Pennsylvania.  Founded in 1998 and beginning play in 1999, the club plays in the Eastern Conference of the United Soccer League, the second tier of the American Soccer Pyramid.  Since 2013, the Riverhounds have played their home games at the 3,500-seat Highmark Stadium, a soccer-specific stadium located in Station Square.  Their current head coach is Dave Brandt.  Saint Lucian international David Flavius currently holds the club records for most appearances and goals which he set over his eight seasons with the Riverhounds between 1999 and 2006.  Since December 2015, the Riverhounds have had an affiliate partnership with Columbus Crew SC of Major League Soccer.  In June 2017, the Riverhounds entered into a developmental partnership with the Ocean City Nor'easters of the Premier Development League, the fourth tier of the American Soccer Pyramid, through the 2018 season.

North American Soccer League: The North American Soccer League (NASL) is a professional men's soccer league with eight teams: six in the United States, one in Canada and one in Puerto Rico.  It is sanctioned by the United States Soccer Federation (U.S. Soccer) as a Division II league in the United States soccer league system, under Major League Soccer (MLS) and alongside United Soccer League (formerly USL Pro).  It is headquartered in New York City.

Said Ali: Said Ali (born October 26, 1980) is a former Canadian-Jordanian forward who began his career in 2004 with Pittsburgh Riverhounds in the USL Pro Select League.  During his rookie season he had a tremendous season finishing third in the overall league scoring charts, and claiming Pittsburgh first Conference Title.  He was named the USL Pro Soccer League Rookie of the Year, and the following season he signed with USL First Division giants the Vancouver Whitecaps.  Unfortunately he didn't feature much in the starting lineup and was traded to the Toronto Lynx, where he struggled to record a single goal.  He would conclude his career in the Canadian Soccer League, and win the CSL Championship with the Serbian White Eagles.

Premier Development League: The Premier Development League (commonly known as the PDL) is a development league sponsored by United Soccer Leagues in the United States and Canada, forming part of the United States soccer league system.  The league has 72 teams competing in four conferences, split into ten regional divisions.  Unofficially, it is considered to be the fourth tier of competition, behind Major League Soccer, the North American Soccer League and the United Soccer League.  With USL Pro re-branding as the United Soccer League in February 2015, the PDL dropped the "USL" descriptor from their name, simply operating as the "Premier Development League".  PDL is headquartered in Tampa.

Marc Dos Santos: Marc Dos Santos (born May 26, 1977) is a Canadian soccer manager with experience in the United Soccer League, North American Soccer League, and Major League Soccer.  He currently is the manager of the San Francisco Deltas of the North American Soccer League, beginning play in the 2017 season.  Most recently, he was the manager of the Swope Park Rangers of the United Soccer League, an affiliate of Sporting Kansas City of Major League Soccer.  The North American Soccer League Coach of the Year in 2015, Dos Santos led the Ottawa Fury FC to the NASL Championship Final after a first-place finish in the Fall Season.  Previously, he focused on youth initiatives in Brazil with FC Primeira Camisa (U-20's) and SE Palmeiras (U-15's), culminating with a Copa do Brasil Sub-15 championship and a technical director position with Desportivo Brasil.  The Montreal native was first hired by the Montreal Impact in January 2007 to lead the club's reserve team, Trois-Rivieres Attak FC, in the Canadian Soccer League.  After leading the squad to titles in their initial two seasons – first as 2007 Open Canada Cup champions, then as 2008 CSL National Division champions – Dos Santos was added to the Impact's technical staff as an assistant coach in June 2008 and became head coach in May 2009.  During his tenure, the Impact won the inaugural Canadian Championship in 2008 to claim the Voyageurs Cup and a berth in the 2008-09 CONCACAF Champions League.  Dos Santos then led Montreal through three different leagues in consecutive campaigns, winning the USL First Division title in 2009 before transitioning into USSF Division 2 in 2010 and the North American Soccer League in 2011.

National Premier Soccer League: The National Premier Soccer League (NPSL) is an American soccer league commonly recognized as being a fourth tier league although it has been given no official designation by US Soccer.  Although the league is officially affiliated to the United States Adult Soccer Association (USASA) and qualifies for the U.S. Open Cup through USASA channels, the league is generally considered to be at the fourth tier of competition in the United States soccer pyramid, behind Major League Soccer (MLS), the North American Soccer League (NASL), and the United Soccer League (USL), and roughly equal with the Premier Development League (PDL).  It is the successor of the Men's Premier Soccer League, a regional league originally based out of the Western United States, which has now expanded nationwide to encompass teams from 29 states.  The league's motto is "A National League with a Regional Focus".  Some of the clubs are former USL clubs.

2015 Sacramento Republic FC season: The 2015 Sacramento Republic FC season is the club's second season of existence.  The club is playing in the newly rebranded United Soccer League (USL), formerly known as USL Pro, the third tier of the American soccer pyramid.  After offseason expansion of the USL from 14 to 24 teams and division into an Eastern and Western Conference, Sacramento Republic FC is competing in the new Western Conference of the USL.  The Republic will be playing as defending champions, having defeated the Harrisburg City Islanders 2-0 on September 27, 2014.  The season began on March 21 and concluded on September 20.

United Soccer League: The United Soccer League (USL), formerly known as USL Pro, is a professional men's soccer league in the United States and Canada that began its inaugural season in 2011.  USL is sanctioned as a Division II Professional League by the United States Soccer Federation (U.S. Soccer), placing it under Major League Soccer (Division I) in the hierarchy.  The USL is headquartered in Tampa.

2010 Miami FC season: The 2010 Miami FC season was the fifth season of the club.  Previously, they fielded a team in the USL First Division.  Along with other clubs, Miami FC broke away from the previous league to form the new North American Soccer League.  Nonetheless, the club fielded a team in the NASL Conference of the USSF Division 2 Professional League, the second tier of the American Soccer Pyramid at the time.  (The USSF D2 was a temporary professional soccer league created by the United States Soccer Federation (USSF) in 2010 to last just one season.  It was a compromise between the debating United Soccer Leagues (USL) and the North American Soccer League (NASL) while the USSF determined which league would eventually receive second or third division status).  This year the team finished fourth in the NASL Conference Standings and ninth in the playoff standings, missing the post season.  This was the last year of the team as the new NASL was launched the following year.  The club connected with the original Fort Lauderdale Strikers club and launched a new team and franchise in the NASL under the Strikers' name starting in the 2011 season.

Kay Banjo: Olakunle "Kay" Banjo (born December 3, 1992) is an American soccer player who plays for the Pittsburgh Riverhounds in the USL.

Supporting paragraphs: Kay Banjo United Soccer League
Answer: 2011