St. Louis Rams running back Benny Cunningham (36) rushes for a gain during an NFL football game against the Washington Redskins at FedEx Field on Sunday, Sept. 20, 2015 in Landover, Maryland. Washington won 24-10. (Aaron M. Sprecher via AP)

St. Louis Rams running back Benny Cunningham (36) is defended by Tampa Bay Buccaneers cornerback Mike Jenkins (24) on a 101-yard kickoff return in the fourth quarter during an NFL football game on Monday, Dec. 17, 2015 in St. Louis. (Kirby Lee/NFL)

Los Angeles Rams running back Benny Cunningham (23) returns a kickoff in an NFL game against the Carolina Panthers, Sunday, Nov. 6, 2016 in Los Angeles. (Margaret Bowles via AP)

Los Angeles Rams running back Benny Cunningham (23) runs with the ball during an NFL football game against the Dallas Cowboys at the Los Angeles Memorial Coliseum on August 13, 2016 in Los Angeles. (Ben Liebenberg via AP)

St. Louis Rams running back Benny Cunningham runs a kick back 102 yards during the fourth quarter of an NFL football game against the Tampa Bay Buccaneers on Thursday, Dec. 17, 2015, in St. Louis. (AP Photo/Billy Hurst)

Los Angeles Rams running back Benny Cunningham (23) returns a kickoff in an NFL game against the Carolina Panthers, Sunday, Nov. 6, 2016 in Charlotte, N.C. (Margaret Bowles via AP)

St. Louis Rams running back Benny Cunningham (36) runs against the San Francisco 49ers during the first half of an NFL football game in Santa Clara, Calif., Sunday, Jan. 3, 2016. (AP Photo/Marcio Jose Sanchez)

Los Angeles Rams running back Benny Cunningham (23) during a preseason NFL football game against the Kansas City Chiefs, Saturday, Aug. 20, 2016, in Los Angeles. (AP Photo/Rick Scuteri)

St. Louis Rams running back Benny Cunningham (36) warms up prior to an NFL football game against the Pittsburgh Steelers at Edward Jones Dome on Sunday, Sept. 27, 2015 in St. Louis, Mo. (Peter Read Miller via AP)

Chicago Bears running back Benny Cunningham (30) dives to the end zone against Green Bay Packers defensive back Marwin Evans (25) as Cunningham fumbles the ball during the first half of an NFL football game, Sunday, Nov. 12, 2017, in Chicago. (AP Photo/Nam Y. Huh)

Chicago Bears running back Benny Cunningham (30) runs from Minnesota Vikings outside linebacker Anthony Barr (55) during the second half of an NFL football game, Sunday, Dec. 31, 2017, in Minneapolis. (AP Photo/Bruce Kluckhohn)

Chicago Bears running back Benny Cunningham (26) celebrates his touchdown with tight end Adam Shaheen (87) during the second half of a preseason NFL football game against the Arizona Cardinals, Saturday, Aug. 19, 2017, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Los Angeles Rams running back Benny Cunningham (23) walks through the tunnel prior to an NFL football game against the Seattle Seahawks at the Los Angeles Memorial Coliseum on Sunday, Sept. 18, 2016 in Los Angeles. (Ben Liebenberg via AP)

Los Angeles Rams running back Benny Cunningham (23) runs with the ball during a NFL preseason football game against the Denver Broncos on Saturday, Aug. 27th, 2016 in Denver. (Peter Read Miller via AP)

Chicago Bears running back Benny Cunningham (30) runs to the end zone for a touchdown during the second half of an NFL football game against the Minnesota Vikings, Monday, Oct. 9, 2017, in Chicago. (AP Photo/Darron Cummings)

Chicago Bears running back Benny Cunningham (30) celebrates a first down against the Baltimore Ravens in the first half at the Pro Football Hall of Fame NFL preseason game, Thursday, Aug. 2, 2018, in Canton, Ohio. (AP Photo/Ron Schwane)

Chicago Bears running back Benny Cunningham (30) catches a pass during warm-ups in an NFL preseason game against the Denver Broncos, Saturday, Aug. 18, 2018 in Denver. (Margaret Bowles via AP)

St. Louis Rams running back Benny Cunningham (36) runs the ball during an NFL football game against the Seattle Seahawks on Sunday, Dec. 27, 2015 in Seattle. (Peter Read Miller via AP)

Chicago Bears running back Benny Cunningham (30) runs to the end zone for a touchdown during the second half of an NFL football game against the Minnesota Vikings, Monday, Oct. 9, 2017, in Chicago. (AP Photo/Charles Rex Arbogast)