Question: The San Diego Chargers drafted a new quarterback in 1998, who eventually played how many seasons in the NFL?

Context paragraphs:
Natrone Means: Natrone Jermaine Means (born April 26, 1972) is a former professional American Football running back who played for the San Diego Chargers, Jacksonville Jaguars, and Carolina Panthers of the NFL from 1993 to 2000.  He was selected by the Chargers in the 2nd round (41st overall) of the 1993 NFL Draft.  In 1994, he was selected to the Pro Bowl during San Diego's Super Bowl season.  He is a member of the San Diego Chargers 50th Anniversary Team.  Means was nicknamed Natrone "Refried" Means and, later, "Natrone Means Business" by ESPN's Chris Berman,

Los Angeles Chargers retired numbers: The Los Angeles Chargers are a professional American football team in the National Football League (NFL) based in the Greater Los Angeles Area.  The club began play in 1960 as a charter member of the American Football League (AFL), and spent its first season in Los Angeles before moving to San Diego in 1961.  They returned to Los Angeles in 2017.  NFL teams assign each of their players a jersey number ranging from 1 through 99.  The Chargers no longer issue four retired numbers.  As of 2010, the team's policy was to have the Chargers Hall of Fame committee evaluate candidates for a player's number to retire after the player has retired from the league after five years.  The committee consisted of Chargers Executive Vice President A. G. Spanos, Chargers public relations director Bill Johnston, San Diego Hall of Champions founder Bob Breitbard, and the presidents of the San Diego Sports Commission and the Chargers Backers Fan Club.  There are few recognized guidelines in sports regarding retiring numbers, and the NFL has no specific league policy.  "You have to have enough numbers for players to wear," said NFL spokesman Greg Aiello.  The Chargers have rarely retired numbers.  The "San Diego Union-Tribune" wrote, "The [Chargers] tend to honor their heritage haphazardly."

San Diego Super Chargers: "San Diego Super Chargers" was the fight song of the San Diego Chargers (now known as the Los Angeles Chargers) of the National Football League (NFL).  The disco song was written in 1979 during the Air Coryell era of the San Diego Chargers, and it was recorded by a session band dubbed "Captain Q.B. and the Big Boys."  New Chargers owners replaced the song in 1989 with a non-disco cover version, but the original version was revived around 2002.  The team itself was also sometimes referred to as the "San Diego Super Chargers".

John Hendy (American football): John Hendy is a former professional American football player who played defensive back for two seasons for the San Diego Chargers* John H. Hendy American football player San Diego Chargers 1985 to 1987 Drafted by the San Diego Chargers in the 3rd round (69th overall) of the 1985 NFL Draft.  Voted First Team NFL All-Rookie at cornerback 1985 was also named AFC Player of the Week 14 for his 2 interception game returning one 75 yards for a touchdown against Buffalo Bills.  Also coached successfully at Wilcox High School as an assistant for 7 years helping earn the schools 2 CCS championships

Burt Grossman: Burt L. Grossman (born April 10, 1967) is a former American football defensive end in the National Football League.  Before becoming a professional, Grossman played college football at the University of Pittsburgh where he was a three time All-ECAC selection.  In 1989, he was drafted by the San Diego Chargers.  Grossman played six seasons in the NFL: five for the San Diego Chargers (1989–1993) and one for the Philadelphia Eagles (1994).  As an NFL player, Grossman's accomplishments include 45 quarterback sacks and three safeties.

Mark Fellows: Mark Fellows (born February 26, 1963) is a former American football linebacker for the San Diego Chargers of the National Football League (NFL).  He played college football for Montana State.  He was drafted by the San Diego Chargers with the 196th overall pick in the 1985 NFL Draft.  He played for the Chargers in 1985 and 1986.

Kris Dielman: Kristopher M. Dielman (born February 3, 1981) is a former American football guard who played for the San Diego Chargers of the National Football League (NFL) for nine seasons.  He played college football for Indiana University.  The San Diego Chargers signed him as an undrafted free agent in 2003, and he played his entire professional career for the Chargers.  He was selected to the Pro Bowl four times, and was a member of the Chargers 50th Anniversary Team.

1998 San Diego Chargers season: The 1998 San Diego Chargers season began with the team trying to improve on their 4–12 record in 1997.  It was Kevin Gilbride’s final season as the team's head coach.  After a 2–4 start, Gilbride was fired and June Jones coached the final ten games of the season as interim head coach.  The team's defense led the league in yards allowed; however, a weak offense under infamous draft bust quarterback Ryan Leaf meant that the team was last in the AFC West.

Ryan Leaf: Ryan David Leaf (born May 15, 1976) is a former American football player who was a quarterback in the National Football League (NFL) for four seasons.  He played for the San Diego Chargers and the Dallas Cowboys between 1998 and 2001, and also spent time with the Tampa Bay Buccaneers and the Seattle Seahawks.

John Holecek: John Francis Holecek (born May 7, 1972 in Steger, Illinois) is a former professional American football player who played linebacker for eight seasons in the NFL for the Buffalo Bills, the San Diego Chargers, and the Atlanta Falcons.  He went to college at University of Illinois at Urbana-Champaign.  He was drafted by the Buffalo Bills in 1995, went to the San Diego Chargers in 2001, and last to the Atlanta Falcons in 2002.  Holecek played in the NFL for 8 seasons, and then returned to Chicago area.  He currently coaches football at Loyola Academy - who won the 2015 Class 8A Illinois Football Championship.  Holecek was a finalist for the 2015 National Coach of the Year award.

Supporting paragraphs: 1998 San Diego Chargers season Ryan Leaf
Answer: four seasons