Question: Edgerton Hartwell was a member of the football team that played in what league?

Context paragraphs:
D.C. Armor: The D.C. Armor was a professional indoor football team that began play in the American Indoor Football Association (AIFA) in the 2009 season.  The team was based in Washington, D.C., with home games at the under-renovation D.C. Armory.  The Armor were the first professional football team to play within the District of Columbia since the Washington Redskins left for FedExField in 1997.  The Armor was also the area's first indoor football team since the Washington Commandos played in the Arena Football League in 1990, and the only arena/indoor football team to play within the district (the Commandos played in the Capital Centre and the Patriot Center).  After one, poorly attended season, the Armor folded.

Las Vegas Locomotives: The Las Vegas Locomotives (called the Locos for short) were a professional American football team based in Las Vegas, Nevada that played in the United Football League.  The team played their home games at Sam Boyd Stadium, home field for the University of Nevada, Las Vegas.  Jim Fassel was the franchise's head coach, president, and general manager.  The Locomotives appeared in all three UFL Championship Games, winning both the 2009 and 2010 iterations; the Locos were also the last of the four charter UFL franchises to remain in their original home city, to retain their original head coach, and to have played all of their home games at the same venue.

Knoxville NightHawks: The Knoxville NightHawks were a professional indoor football team based in Knoxville, Tennessee.  The team was a member of the Professional Indoor Football League (PIFL).  The NightHawks joined the PIFL in 2012 as an expansion team.  The NightHawks were the second indoor/arena football team based in Knoxville, following the Tennessee ThunderCats which played in the Indoor Professional Football League for the 2001 season before joining the National Indoor Football League where they played the 2002 and 2003 seasons (the latter of which they played as the Tennessee Riverhawks) before moving to Greenville, South Carolina.  The Owner of the NightHawks was Southern Sports Entertainment, LLC.  The NightHawks played their home games at the James White Civic Coliseum in Knoxville, Tennessee.

Maryland Maniacs: The Maryland Maniacs were a professional Indoor Football team based in College Park, Maryland, and a member of the Indoor Football League.  The team began play in 2009 as an expansion team in the Indoor Football League.  The Maniacs were the second indoor football team to be based in Maryland, following the Chesapeake Tide of the Continental Indoor Football League, who played in the same market.  The owner of the Maniacs was Messay Hailermariam.  The Maniacs played its home games at Cole Field House.  Inaugural season home games were held at The Show Place Arena.  They left the Indoor Football League in 2011, and have been rumored to be in discussion with American Indoor Football about joining their league.

John A. Hartwell: John Augustus "Josh" Hartwell (September 27, 1869 – November 30, 1940) was an American football player and coach, military officer, and physician.  Hartwell attended Yale University, where he played end for Walter Camp's Bulldogs football team from 1888 to 1891.  In 1891, Hartwell was named an All-American for a season in which Yale was unbeaten, untied, unscored against, and later recognized as a national champion by a number of selectors.

Marion Mayhem: The Marion Mayhem were a professional indoor football team based in Marion, Ohio.  The team was a charter member of the Great Lakes Indoor Football League (GLIFL), later renamed the Continental Indoor Football League (CIFL), joining in 2006 as an expansion team.  The Mayhem were the first professional indoor football team to be based in Marion, but were the second pro football team to be based in the area since the NFL's Oorang Indians.  The team folded during the 2010 season due to financial problems.  The Owners of the Mayhem were Michael Burtch and Stanley Jackson.  They played their home games at the Veterans Memorial Coliseum in Marion, Ohio.

Dayton Sharks: The Dayton Sharks were a professional indoor football team based in Dayton, Ohio.  The team was a member of the Continental Indoor Football League (CIFL).  The franchise started as an expansion team in the CIFL during the 2013 season.  The Sharks were the fifth indoor football team to be based in Dayton, the first being the Dayton Skyhawks of the original Indoor Football League.  The Skyhawks were followed by the Dayton Warbirds, who later became the Dayton Bulldogs, of the National Indoor Football League the third being the Cincinnati Marshals who played their 2007 season in Dayton and the fourth being the Dayton Silverbacks who played from 2006 to 2012.  The Owner of the Sharks was CA Sports Entertainment LLC.  The Sharks played their home games at Hara Arena in nearby Trotwood, Ohio.

Austin Turfcats: The Austin Turfcats were a professional indoor football team based in Austin, Texas.  The Turfcats were a member of the Indoor Football League (IFL) during the 2010 season, after being a charter member of the Southern Indoor Football League (SIFL) during their inaugural 2009 season.  The Turfcats played their home games at Luedecke Arena at the Travis County Exposition Center.  This was Austin's fourth attempt at an indoor football team; the prior three were the Indoor Professional Football League's Texas Terminators (1999), the National Indoor Football League's Austin Knights/Rockers (2002–2003), and the Arena Football League (later af2's) Austin Wranglers (2004–2008) (the former two of which played in Luedecke Arena before the Turfcats).

Edgerton Hartwell: Edgerton "Ed" Hartwell II (born May 27, 1978) is a former American football linebacker.  He played college football at Western Illinois and was drafted by the Baltimore Ravens in the fourth round of the 2001 NFL Draft.  Hartwell was also a member of the Atlanta Falcons, Cincinnati Bengals, Oakland Raiders and Las Vegas Locomotives.

Dayton Silverbacks: The Dayton Silverbacks were a professional indoor football team based in Dayton, Ohio.  The team was a member of the Continental Indoor Football League (CIFL).  The franchise started as the Miami Valley Silverbacks and joined the CIFL in 2007 after playing their inaugural season as an expansion team in the American Indoor Football Association.  The Silverbacks were the fourth indoor football team to be based in Dayton, the first being the Dayton Skyhawks of the original Indoor Football League.  The Skyhawks were followed by the Dayton Warbirds, who later became the Dayton Bulldogs, of the National Indoor Football League and the third being the Cincinnati Marshals who played their 2007 season in Dayton.  The Owner of the Silverbacks was April Shellenberger.  The Silverbacks played their home games at Hara Arena in nearby Trotwood, Ohio.

Supporting paragraphs: Edgerton Hartwell Las Vegas Locomotives
Answer: United Football League