Question: Which former American football linebacker on the  the Baltimore Ravens of the National Football League (NFL) did Roosevelt Barnes negotiate contracts for?

Context articles: Ray Lewis
Roosevelt Barnes (American football)
Jarret Johnson
Brandon Barnes (linebacker)
C. J. Mosley (linebacker)
Tavares Gooden
Zach Orr
Mike Smith (linebacker)
Jason Phillips (linebacker)
Gary Stills

Raymond Anthony Lewis Jr. (born May 15, 1975) is a former American football linebacker, who played all of his 17-year professional career for the Baltimore Ravens of the National Football League (NFL).
 He previously played college football for the University of Miami, and earned All-America honors.
 Lewis was drafted by the Ravens in the first round of the 1996 NFL Draft, and, upon his retirement following the 2012 season, he was the last remaining active player from the team's inaugural season.
Roosevelt Barnes, Jr. (born August 3, 1958 in Fort Wayne, Indiana) is a retired football linebacker for the Detroit Lions of the National Football League and a current sports agent.
 He played three sports at Purdue University—football, basketball, and baseball.
 While he was most noted as a football player, he also enjoyed significant success in basketball, playing on Purdue's 1980 Final Four team.
 After retiring from professional football, in 1987 Barnes became a partner and contract advisor with Maximum Sports Management.
 Over the years, Barnes has become one of the top contract negotiators in the industry.
 He has negotiated contracts for Laveranues Coles, Walter Jones, Ray Lewis, Ndamukong Suh, and Andre Wadsworth, among others.
Jarret Webster Johnson (born August 14, 1981) is a former American football linebacker who played in the National Football League for twelve seasons.
 He was drafted in the fourth round (109th overall) in the 2003 NFL Draft by the Baltimore Ravens and also played for the San Diego Chargers.
 He played college football for the University of Alabama.
Brandon Edward Barnes (born June 12, 1981 in Sikeston, Missouri) is a former American football linebacker of the National Football League.
 He was signed by the Baltimore Ravens as an undrafted free agent in 2004.
 He played college football at Missouri.
Clint "C. J." Mosley Jr. (born June 19, 1992) is an American football linebacker for the Baltimore Ravens of the National Football League (NFL).
 He played college football at Alabama, and was drafted by the Ravens in the first round of the 2014 NFL Draft.
Tavares Gooden (born October 7, 1984) is a former American football linebacker who played in the National Football League (NFL).
 He was drafted by the Baltimore Ravens in the third round of the 2008 NFL Draft.
 He played college football at the University of Miami.
Zachary Orr (born June 9, 1992) is a former American football linebacker who played three seasons in the National Football League (NFL).
 He played college football at North Texas and signed with the Baltimore Ravens as an undrafted free agent in 2014.
Michael Lee Smith (born September 2, 1981) is the assistant defensive line coach for the Kansas City Chiefs.
 A retired American football linebacker, he played for the Baltimore Ravens of the National Football League (NFL) and Texas Tech at the collegiate level.
 He was drafted by the Ravens in the seventh round of the 2005 NFL Draft.
Jason Wesley Phillips (born February 14, 1986) is a former American football linebacker who played in the National Football League (NFL).
 He was drafted by the Baltimore Ravens in the fifth round of the 2009 NFL Draft.
 He played college football at Texas Christian University (TCU).
Gary Stills (born July 11, 1974) is a former American football linebacker who played nine seasons in the National Football League (NFL).
 He played college football for West Virginia University.
 He was drafted by the Kansas City Chiefs in the third round of the 1999 NFL Draft, and also played for the Baltimore Ravens, St. Louis Rams and Las Vegas Locomotives.