Tennessee Titans' quarterback Marcus Mariota takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' outside linebacker Brian Orakpo takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota stretches during an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel supervises an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel and quarterback Marcus Mariota take part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota, center, takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' running back Derrick Henry stretches during an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel and quarterback Marcus Mariota take part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterbacks Marcus Mariota, left, and Blaine Gabbert take part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel supervises an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota, center left, hands off to running back Dion Lewis, 33, during an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' running back Dion Lewis stretches during an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota, 8, takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota, center left 8, hands off to running back Derrick Henry, 22, during an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' offensive tackle Taylor Lewan stretches during an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' outside linebacker Brian Orakpo, left, takes part in an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' linebacker Wesley Woodyard gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' cornerback Logan Ryan gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' quarterback Marcus Mariota gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' head coach Mike Vrabel gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' linebacker Wesley Woodyard gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' linebacker Wesley Woodyard, left, and cornerback Logan Ryan react as they are photographed waiting their turn to give press conferences after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' linebacker Wesley Woodyard gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' cornerback Logan Ryan gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' linebacker Wesley Woodyard gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' linebacker Wesley Woodyard, left, and cornerback Logan Ryan react as they are photographed waiting their turn to give press conferences after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)

Tennessee Titans' safety Kevin Byard gives a press conference after an NFL training session at Syon House, in Syon Park, south west London, Friday, Oct. 19, 2018. The Tennessee Titans are preparing for an NFL regular season game against the Los Angeles Chargers in London on Sunday. (AP Photo/Matt Dunham)