Question: Jack Hoffman was introduced to the current running back for which team while the player was at the University of Nebraska?

full_context: Document 1: Running back: A running back (RB) is an American and Canadian football position, a member of the offensive backfield. The primary roles of a running back are to receive handoffs from the quarterback for a rushing play, to catch passes from out of the backfield, and to block. There are usually one or two running backs on the field for a given play, depending on the offensive formation. A running back may be a halfback (in certain contexts also referred to as a tailback) or a fullback. A running back will sometimes be called a "feature back" if he is the team's starting running back.
Document 2: Randy Bullock: Randy Bullock (born December 16, 1989) is an American football placekicker for the Cincinnati Bengals of the National Football League (NFL). He played college football at Texas A&M, and was recognized as the nation's best college football kicker and a consensus All-American. He was selected by the Houston Texans in the fifth round of the 2012 NFL Draft, after winning college football's Lou Groza Award. Bullock is currently the 29th most accurate placekicker in NFL history.
Document 3: Andrew Luck: Andrew Austen Luck (born September 12, 1989) is an American football quarterback for the Indianapolis Colts of the National Football League (NFL). He played college football at Stanford, where he won the Maxwell Award and Walter Camp Award as college football's player of the year and was twice recognized as an All-American. He was the runner-up for the Heisman Trophy in both 2010 and 2011. He was named the Offensive Player of the Year in the Pac-12 (Pac-10) Conference in both 2010 and 2011. CBS Sports draft analyst Rob Rang called Luck the best prospect he had ever scouted, while the "Kansas City Star" put him in line with LeBron James and Bryce Harper as "the most hyped amateurs in recent sports memory."
Document 4: Freddie Steinmark: Faith, Family, Football: Freddie Steinmark: Faith, Family, Football is a 2015 non-fiction biography written by Bower Yousse and Thomas J. Cryan, and is the exploration of University of Texas football player Freddie Joe Steinmark’s brief life. This is the first book written with complete access to the Steinmark family and their archives, by Freddie’s close friend Bower Yousse and colleague Thomas J. Cryan. The book is an insider’s account of Freddie’s life and the challenges he faced. This book takes the reader through Freddie’s world of family, faith, and athletics, his tenure as a patient, and eventually his role as a spokesperson for the American Cancer Society, during which time he inspired President Nixon to promote and sign into law the National Cancer Act of 1971, and begin the US’s “War on Cancer.”
Document 5: Trent Richardson: Trenton Jamond Richardson (born July 10, 1990) is an American professional Canadian football running back for the Saskatchewan Roughriders of the Canadian Football League (CFL). He played college football for the University of Alabama, was recognized as an All-American, and was a member of two BCS National Championship teams. Considered the top running back prospect for the 2012 NFL Draft, Richardson was considered by some as the best running back prospect since Adrian Peterson, and was selected third overall by the Cleveland Browns. After being traded away from the Browns after just two seasons with the team, and out of the NFL in just five, he is often considered one of the biggest draft busts in league history.
Document 6: The Jimmy Fund: The Jimmy Fund was founded in 1948 and raises money solely to support adult and pediatric cancer care and research at Dana-Farber Cancer Institute in Boston, Massachusetts.
Document 7: Rex Burkhead: Rex Burkhead (born July 2, 1990) is an American football running back for the New England Patriots of the National Football League (NFL). He played college football at Nebraska and was drafted by the Cincinnati Bengals in the sixth round of the 2013 NFL Draft.
Document 8: Richie Incognito: Richard Dominick Incognito Jr. (born July 5, 1983) is an American football guard for the Buffalo Bills of the National Football League (NFL). Before playing for the NFL, he played college football for the University of Nebraska. Incognito was drafted by the St. Louis Rams in the third round of the 2005 NFL Draft and played for them through the 2009 season. Incognito played for the Buffalo Bills during the 2009 season and the Miami Dolphins from 2010 to 2013.
Document 9: Team Hole in the Wall: Team Hole in the Wall is an athletic fundraising initiative managed by the Hole in the Wall Gang Camp. Amateur athletes join up to raise a specified amount of funds and receive entrance to a marathon, bike ride or other athletic event in support of seriously ill children served by The Hole in the Wall Gang Camp or one of its associated camps around the world. Established in 2005, Team Hole in the Wall offers entrance into more than two dozen marathons and cycling events, including the New York City Marathon, Boston Marathon and AngelRide cycling event in Connecticut. New Canaan resident and Newman's Own Vice President of Marketing Michael “Mike” Havard ran in the ING New York City Marathon prior to 2004, but in that year he decided to use his participation to raise funds for The Hole in the Wall Gang Camp, raising nearly $40,000. The next year, he served as captain of the first Team Hole in the Wall team of 40 runners, raising $150,000. The number of Team Hole in the Wall members and events has risen each year since. In 2010, more than 1,800 Team Hole in the Wall members are expected to participate in 20 athletic events.
Document 10: Christian McCaffrey: Christian Jackson McCaffrey (born June 7, 1996) is an American football running back for the Carolina Panthers of the National Football League (NFL). He played college football at Stanford, and was drafted by the Panthers with the eighth overall pick in the 2017 NFL Draft. As a sophomore in 2015, McCaffrey was the AP College Football Player of the Year and the runner-up for the Heisman Trophy. He holds the NCAA record for most all-purpose yards in a season with 3,864. He is the son of former Stanford and NFL wide receiver Ed McCaffrey and former Stanford soccer star Lisa McCaffrey, who is the daughter of U.S. Olympian Dave Sime.
Document 11: Jack Hoffman: Jack Hoffman (born September 26, 2005) from Atkinson, Nebraska, has pediatric brain cancer. In 2012, between his first and second brain surgeries, he was introduced to Rex Burkhead, then a football player for the Nebraska Cornhuskers football team. Subsequently, a close connection developed between Hoffman and the team. On April 6, 2013, at the annual Nebraska spring game, Hoffman at age 7 entered the game during the fourth quarter and ran for a 69 yd touchdown that received national and international attention. He subsequently met with President Barack Obama, received a Best Moment ESPY Award for 2013, and the United States Senate approved a motion recognizing his role in raising awareness of pediatric brain cancer. The Team Jack Foundation was formed by his parents, Andy and Bri Hoffman, to raise money for pediatric brain research.
Document 12: Steve Rexe: Stephen Glen Rexe (February 26, 1947 – November 12, 2013) was a former hockey goaltender, the first ever draft pick of the NHL Pittsburgh Penguins and second overall pick in the 1967 NHL Amateur Draft.
Document 13: Jack Burkman: Jack Burkman is an American lobbyist. He is the president of the lobbying firm Burkman Associates, LLC. Burkman drew significant media attention for organizing a protest against the Dallas Cowboys NFL football team after it signed Michael Sam, an openly gay football player to its practice squad. He is the host of the radio show "Behind the Curtain" on Radio America.
Document 14: Nigerian Institute of American Football: The Nigerian Institute of American Football was founded in June, 2011 at Ahmadu Bello University in Zaria, Nigeria. The Institute was founded by three American former-athletes. Daryl Hayes (an assistant coach at Shepherd University of West Virginia), Ricardo Dickerson (former football standout at the University of Maryland/Oakland Raiders), and Gregory Hendricks (former professional basketball player/coach) collaborated to bring American football to Nigeria. The three, along with Professional Basketball player and Nigerian National Basketball Team Captain Ejike Ugboaja, found a unique niche for the football while leading basketball camps in Ejike’s homeland of Nigeria. The Ejike Ugboaja Foundation has operated basketball camps for young Nigerian players for many years. With the number of Nigerian descendants currently playing football at the collegiate and professional levels, it seemed a natural fit to begin teaching the sport in Nigeria.
Document 15: Rex Ryan: Rex Ashley Ryan (born December 13, 1962) is a former American football coach and current ESPN analyst. Ryan was formerly the head coach of the New York Jets and Buffalo Bills of the National Football League (NFL), and also held various coaching positions with eight other NFL and college teams.
ground_truth: New England Patriots