Johnny Baker (linebacker)
John Hendrix Baker, III( born March 15, 1941) is a former American football linebacker and tight end.
He played college football at Mississippi State University, where he was a linebacker and an offensive end.
He played professionally in the American Football League( AFL) for the Houston Oilers from 1963 through 1966 and for the San Diego Chargers in 1967.
Mike Rivera (American football)
Mike Rivera( born January 10, 1986) is a former American football linebacker and tight end.
He played college football at Kansas.
Duane Benson
Dean Duane Benson( August 5, 1945 – January 26, 2019) was an American football linebacker and politician.
Cleo Walker
Cleo Walker is a former linebacker and center in the National Football League.
Tyus Jackson
Tyus Jackson( born November 22, 1983) is a former American football linebacker and coach.
John Guzik (linebacker)
John Paul Guzik III( July 12, 1936 – January 22, 2012) was an American football linebacker who played three seasons in the National Football League and American Football League with the Los Angeles Rams and Houston Oilers.
He was drafted by the Los Angeles Rams in the fourth round of the 1958 NFL Draft.
Guzik played college football at the University of Pittsburgh and attended Cecil Township High School in Washington County, Pennsylvania.
He was a Consensus All- American in 1958.
He was a member of the Houston Oilers team that won the 1961 AFL championship.
Ryan Grothaus
Ryan Grothaus( born June 2, 1991) is an American soccer player who currently plays for Dayton Dutch Lions in the USL Professional Division.
Steve Tovar
Steven Eric Tovar( born April 25, 1970) is a former college and professional American football linebacker and a former football coach at the University of Kansas.
Jim Collins (American football)
James Brian Collins( born June 11, 1958) is a former American football linebacker and National Football League Pro Bowler.
Bill Zapalac
Willie Frank Zapalac, Jr.( born September 1, 1948) is a former American football linebacker and defensive end in the National Football League( NFL).

Question: Were John Guzik (Linebacker) and Ryan Grothaus of the same nationality?
Answer: yes