Tennessee Titans quarterback Marcus Mariota (8) passes the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) hands off to running back Derrick Henry (22), left, during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) passes the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers wide receiver Keenan Allen (13), top left, is tackled during the first half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) passes the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers wide receiver Keenan Allen (13) runs with the ball during the first half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers wide receiver Keenan Allen (13) is tackled by Tennessee Titans strong safety Kendrick Lewis (28) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans running back Derrick Henry (22) runs with the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans running back Derrick Henry (22) runs with the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) escapes the challenge of Los Angeles Chargers defensive end Chris Landrum (46) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans tight end Jonnu Smith (81) is tackled during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans wide receiver Corey Davis (84), right, is tackled by Los Angeles Chargers cornerback Casey Hayward (26) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers quarterback Philip Rivers (17) passes the ball during the first half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) passes the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans running back Dion Lewis (33) runs with the ball during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers head coach Anthony Lynn, center, shouts out during the first half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans running back Derrick Henry (22) runs through to score a touchdown during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers quarterback Philip Rivers (17) is greeted by Tennessee Titans linebacker Jayon Brown (55) as he walks from the pitch after an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. Los Angeles Chargers won the match 20-19. (AP Photo/Tim Ireland)

Tennessee Titans quarterback Marcus Mariota (8), left, runs with the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers quarterback Philip Rivers (17) passes the ball during the second half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans running back Derrick Henry (22), top center, celebrates after scoring a touchdown during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans head coach Mike Vrabel stands on the touchline during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers wide receiver Tyrell Williams (16) fails to catch the ball in the end zone as Tennessee Titans cornerback Logan Ryan (26) challenges during the second half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers quarterback Philip Rivers (17) is sacked during the second half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) passes the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans wide receiver Corey Davis (84), right, is tackled by Los Angeles Chargers cornerback Casey Hayward (26) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans defensive back Brynden Trawick (41), third right, sits on the bench during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers running back Austin Ekeler (30), right, runs with the ball during the second half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans tight end Luke Stocker (88) celebrates after scoring a touchdown during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans quarterback Marcus Mariota (8), center, goes over for a touchdown which was later disallowed during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers quarterback Philip Rivers (17), center, joins other players in prayer after an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. Los Angeles Chargers won the match 20-19. (AP Photo/Tim Ireland)

Tennessee Titans tight end Jonnu Smith (81) is tackled during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers wide receiver Keenan Allen (13) is tackled by Tennessee Titans strong safety Kendrick Lewis (28) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans tight end Luke Stocker (88) celebrates after scoring a touchdown during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans running back Derrick Henry (22) runs with the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers quarterback Philip Rivers (17) smiles as he walks from the pitch after an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. Los Angeles Chargers won the match 20-19. (AP Photo/Tim Ireland)

Tennessee Titans wide receiver Taywan Taylor (13) fails to gather the ball during a two-point conversion attempt during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Los Angeles Chargers won the match 20-19. (AP Photo/Tim Ireland)

Los Angeles Chargers quarterback Philip Rivers (17) smiles as he walks from the pitch after an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. Los Angeles Chargers won the match 20-19. (AP Photo/Tim Ireland)

Tennessee Titans head coach Mike Vrabel stands on the touchline during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers running back Austin Ekeler (30), right, is tackled by Tennessee Titans strong safety Kendrick Lewis (28) during the second half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8), left, hands off Los Angeles Chargers outside linebacker Jatavis Brown (57) as he runs with the ball during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans quarterback Marcus Mariota (8), center, goes over for a touchdown which was later disallowed during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans wide receiver Corey Davis (84), right, is tackled by Los Angeles Chargers cornerback Casey Hayward (26) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8), left, runs with the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Tennessee Titans tight end Luke Stocker (88) celebrates after scoring a touchdown during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Cheerleaders line up before an NFL football game between Tennessee Titans and Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8), left, runs with the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers wide receiver Tyrell Williams (16), left, lies on the pitch after failing to catch the ball in the end zone during the second half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers quarterback Philip Rivers (17), right, gestures as he prepares to join other players and coaches in prayer after an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. Los Angeles Chargers won the match 20-19. (AP Photo/Tim Ireland)

Tennessee Titans head coach Mike Vrabel gestures during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) pauses during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans head coach Mike Vrabel pauses during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) wipes his face during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans head coach Mike Vrabel during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) gestures during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) pauses during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) gestures during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans head coach Mike Vrabel gestures during a press conference after an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. Chargers won the match 20-19. (AP Photo/Matt Dunham)

Tennessee Titans quarterback Marcus Mariota (8) passes the ball during the first half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)

Los Angeles Chargers head coach Anthony Lynn, center, shouts out during the first half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans cornerback Logan Ryan (26) blocks a pass intended for Los Angeles Chargers wide receiver Mike Williams (81) during the first half of an NFL football game at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Los Angeles Chargers wide receiver Keenan Allen (13), top left, is tackled during the first half of an NFL football game against Tennessee Titans at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Matt Dunham)

Tennessee Titans tight end Luke Stocker (88) celebrates after scoring a touchdown during the second half of an NFL football game against Los Angeles Chargers at Wembley stadium in London, Sunday, Oct. 21, 2018. (AP Photo/Tim Ireland)