Chart shows the divergence of overall player experience in the NFL since 2005; 2c x 3 1/2 inches; 96.3 mm x 88 mm;

Chart shows the trend in overall NFL player experience; 2c x 3 1/4 inches; 96.3 mm x 82 mm;

Chart series shows average years of NFL player experience by their positions played; 3c x 4 1/2 inches; 146 mm x 114 mm;

Chart series ranks NFL teams by 2018 average player years of experience and shows historic trends since 2005; 4c x 7 3/4 inches; 195.7 mm x 196 mm;

FILE - In this Sept. 3, 2015, file photo, Cincinnati Bengals' Eric Winston (73) throws his gloves to a fan following an NFL preseason football game against the Indianapolis Colts in Indianapolis. Avoiding a work stoppage in 2021 could depend on whether players can secure more guaranteed money in the next collective bargaining negotiations with the NFL. Winston says the best way to ensure more guaranteed money for players is to get them to free agency sooner. (AP Photo/AJ Mast, File)

File - In this Sept. 30, 2018, file photo, Seattle Seahawks defensive back Earl Thomas (29) leaves the field after breaking his leg against the Arizona Cardinals during the second half of an NFL football game in Glendale, Ariz. Though the league's biggest stars receive hefty signing bonuses, the push for more guaranteed money across the life of contracts has slowly picked up steam over the past few seasons. The contract holdouts by Le'Veon Bell and Thomas during this season put the issue into vivid focus. (AP Photo/Ross D. Franklin, File)

FILE - In this Nov. 26, 2017, file photo, Pittsburgh Steelers running back Le'Veon Bell (26) stiff-arms Green Bay Packers strong safety Morgan Burnett (42) during the first half of an NFL football game in Pittsburgh. Though the league's biggest stars receive hefty signing bonuses, the push for more guaranteed money across the life of contracts has slowly picked up steam over the past few seasons. The contract holdouts by Bell and Earl Thomas this season put the issue into vivid focus. (AP Photo/Keith Srakocic, File)