Question: For how many seasons was the running back that Barry Redden was overshadowed by, play in?

Context paragraphs:
1969 WANFL season: The 1969 WANFL season was the 85th season of the Western Australian National Football League.  It saw continued dominance by the three Perth clubs and Subiaco, who occupied the top half of the ladder constantly from the fourth round onwards, and finished four games clear of the other four clubs, who were all in a “rebuilding” mode with varying success – late in the season both Swan Districts and Claremont fielded some of the youngest teams in the competition’s history, whilst the Tigers, who fielded thirteen first-year players including Graham Moss, Russell Reynolds and Bruce Duperouzel, began disastrously but four wins in five games paved the way to impressive record from 1970 to 1972.  Among the top four, Perth failed to achieve a fourth consecutive premiership that at one point looked very much in their grasp due to the overwork of Barry Cable which robbed him of some brilliance, early-season injuries to key players Iseger and Page and a couple of surprising losses to lower clubs, whilst East Perth, who won consistently without being impressive for most of the season, failed for the fourth time in as many seasons in the Grand Final, this time to West Perth and in a much more decisive manner than any of their Perth defeats.

Billy Taylor (running back, born 1956): Billy Taylor (born July 6, 1956) is a former professional American football player who was selected by the New York Giants in the fourth round of the 1978 NFL Draft.  A 6'0", 215-lb.  running back from Texas Tech, Taylor played for five NFL seasons as a running back and kick returner.  He spent his first three seasons as a member of the Giants, and spent his final two split between the Giants, the New York Jets, and the Los Angeles Raiders.  As the starting running back for the Giants, he led the team in rushing in 1979 and 1980.  His best season was in 1979, when he started all 16 games, carrying the ball 198 times for 700 yards and catching it another 28 times for 253 yards with 11 total touchdowns.  The Jets picked him up after the Giants waived him in 1981, but they cut him three weeks later when they needed to add a defensive lineman to replace the injured Marty Lyons.  Taylor then played two seasons for the Washington Federals of the USFL, amassing 171 rushes for 757 yards and 5 touchdowns along with 64 receptions for 523 yards and 2 TDs in 1983.  In 1984, Taylor rushed 142 times for 499 yards while also collecting 51 receptions for 387 yards and a touchdown.

2,000-yard club: The 2,000-yard club is a group of seven National Football League (NFL) running backs that have rushed for 2,000 or more yards in a season.  These seven rushing seasons rank as the highest single-season rushing totals in NFL history, and reaching the 2,000-yard mark is considered a significant achievement for running backs.  No running back has yet achieved this feat twice.  The first 2,000-yard season was recorded in 1973 by Buffalo Bills running back O.J. Simpson.  He is the only player to have surpassed 2,000 yards in a 14-game season, as all others occurred in 16-game seasons; he finished the season with 2,003 rushing yards, averaging six yards per carry and an NFL-record 143.1 rushing yards per game.  Los Angeles Rams running back Eric Dickerson, who had broken the single-season rookie rushing record in 1983, recorded the second 2,000-yard season in 1984.  Dickerson rushed for 2,105 yards, the current NFL rushing record, and averaged 131.6 rushing yards per game.

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.

Eric Dickerson: Eric Demetric Dickerson (born September 2, 1960) is a former college and professional American football player who was a running back in the National Football League (NFL) for eleven seasons during the 1980s and 1990s.  Dickerson played college football for the SMU Mustangs of Southern Methodist University and was recognized as an All-American.  He was selected in the first round of the 1983 NFL Draft and played professionally for the Los Angeles Rams, Indianapolis Colts, Los Angeles Raiders, and Atlanta Falcons of the NFL.  During his NFL career, he rushed for over 13,000 yards.  He holds the NFL's single-season rushing record with 2,105 yards, set in 1984.  Dickerson was inducted into the Pro Football Hall of Fame in 1999.

Wheel (route): A wheel route is a pattern run by a receiver or running back in American football.  If a receiver runs it, they will immediately run a quick out pattern, then proceed to turn upfield in a curved pattern.  Typically this route is run by an inside receiver, with the number one receiver heading inside to exploit coverage in the defense.  When run from the running back position the player will run towards the sideline while looking back at the quarterback as if about to receive a pass on a flare route.  The running back will then turn upfield at the sideline and run straight down the field.

List of pre-NHL seasons: Prior to the first season of the National Hockey League (NHL), which commenced on December 19, 1917, there had been many seasons of ice hockey played by various amateur and professional leagues, often held contemporaneously, going back to the 1880s, to which the NHL can trace its roots.  Below is a list of pre-NHL seasons by ice hockey leagues that are precursors of the National Hockey League.

Barry Redden: Barry Redden (born July 21, 1960) is a former American football running back who played for the Los Angeles Rams, the San Diego Chargers, and the Cleveland Browns of the National Football League (NFL).  He spent much of his career playing in the shadow of Pro Football Hall of Fame running back Eric Dickerson.

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.

Counter run: In American football, a counter run is a running play in which the running back will take a step in the opposite direction of the play, only to get the handoff in the other direction.  Weak side linemen will sometimes pull and lead the back downfield (sometimes called a counter trap), but not necessarily.  The play is designed to get the defense to flow away from the action for a few steps, allowing better blocking angles for the offensive line, and more room for the running back.  The purpose of the counter run is to keep defenses honest and prevent them from easily being able to pursue the play aggressively.  It is most effective against defenses that tend to overpursue and can be used on its own to potentially produce a big running play against defenses that get out of position and fail to stay home.

Supporting paragraphs: Barry Redden Eric Dickerson
Answer: eleven