Pittsburgh Steelers quarterback Ben Roethlisberger carries a banner in memory of Steelers owner Dan Rooney before an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Minnesota Vikings quarterback Sam Bradford (8) tosses a football during warmup time before an NFL football game against the Pittsburgh Steelers, Sunday, Sept. 17, 2017, in Pittsburgh. (AP Photo/Keith Srakocic)

Minnesota Vikings quarterback Case Keenum (7) passes during the first half of an NFL football game against the Pittsburgh Steelers in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers wide receiver Martavis Bryant (10) heads for the end zone for a touchdown after taking a pass from quarterback Ben Roethlisberger during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers wide receiver Martavis Bryant (10) celebrates in the end zone after taking a pass from quarterback Ben Roethlisberger for a touchdown during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers wide receiver JuJu Smith-Schuster (19) scores during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) talks with referee Pete Morelli (135) during the first half of an NFL football game against the Minnesota Vikings, in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers running back Le'Veon Bell (26) carries the ball during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers wide receiver Martavis Bryant (10) has a pass broken up by Minnesota Vikings cornerback Trae Waynes (26) during the first half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) celebrates a first-down touchdown pass to Martavis Bryant during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers running back Le'Veon Bell (26) is tackled by Minnesota Vikings cornerback Trae Waynes (26) during the first half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers wide receiver Eli Rogers (17) can't get to a Ben Roethlisberger pass while being defended by Minnesota Vikings cornerback Terence Newman (23) during the first half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) throws a pass during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Minnesota Vikings wide receiver Stefon Diggs (14) dives for extra yards after catching a pass from quarterback Case Keenum during the first half of an NFL football game against the Pittsburgh Steelers in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Minnesota Vikings running back Dalvin Cook (33) slips a tackle by Pittsburgh Steelers strong safety Sean Davis (28) to score a touchdown during the second half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers quarterback Ben Roethlisberger looks to pass during the second half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Minnesota Vikings quarterback Case Keenum (7) looks to pass during the second half of an NFL football game against the Pittsburgh Steelers in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers kicker Chris Boswell (9) kicks a field goal out of the hold by Jordan Berry (4) during the second half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers running back Le'Veon Bell (26) stiff arms Minnesota Vikings outside linebacker Anthony Barr (55) as he carries the ball during the second half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Minnesota Vikings quarterback Case Keenum (7) throws a pass to Dalvin Cook for a touchdown under pressure by Pittsburgh Steelers cornerback Joe Haden (21) during the second half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Minnesota Vikings tight end Kyle Rudolph (82) leaps to haul in a pass from quarterback Case Keenum during the second half of an NFL football game against the Pittsburgh Steelers in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Don Wright)

Pittsburgh Steelers outside linebacker Bud Dupree (48) deflects a pass by Minnesota Vikings quarterback Case Keenum (7) during the second half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers outside linebacker Bud Dupree (48) deflects a pass by Minnesota Vikings quarterback Case Keenum (7) during the second half of an NFL football game in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) looks to pass during the second half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers head coach Mike Tomlin stands on the sideline during the first half of an NFL football game against the Minnesota Vikings in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)

Pittsburgh Steelers quarterback Ben Roethlisberger smiles as he shows his shirt meant to honor the late president of the team, Dan Rooney, who died earlier this year, during a news conference after an NFL football game against the Minnesota Vikings, Sunday, Sept. 17, 2017, in Pittsburgh. (AP Photo/Keith Srakocic)

Minnesota Vikings quarterback Case Keenum (7) passes during the first half of an NFL football game against the Pittsburgh Steelers in Pittsburgh, Sunday, Sept. 17, 2017. (AP Photo/Keith Srakocic)