HOUSTON, TX - DECEMBER 10: Defensive Coordinator Robert Saleh of the San Francisco 49ers talks with the linebackes on the sideline during the game against the Houston Texans at NRG Stadium on December 10, 2017 in Houston, Texas. The 49ers defeated the Texans 26-16. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images) less
HOUSTON, TX - DECEMBER 10: Defensive Coordinator Robert Saleh of the San Francisco 49ers talks with the linebackes on the sideline during the game against the Houston Texans at NRG Stadium on December 10, 2017 ... more
Photo: Michael Zagaris / Getty Images
SANTA CLARA, CA - NOVEMBER 05: San Francisco 49ers General Manager John Lynch, Head Coach Kyle Shanahan and Defensive Coordinator Robert Saleh look on during the warm up before the game against the Arizona Cardinals at Levi's Stadium on November 5, 2017 in Santa Clara, California. (Photo by Lachlan Cunningham/Getty Images) less
SANTA CLARA, CA - NOVEMBER 05: San Francisco 49ers General Manager John Lynch, Head Coach Kyle Shanahan and Defensive Coordinator Robert Saleh look on during the warm up before the game against the Arizona ... more
Photo: Lachlan Cunningham / Getty Images
SANTA CLARA, CA - NOVEMBER 05: San Francisco 49ers Defensive Coordinator Robert Saleh talks into his headset during an NFL game between the Arizona Cardinals and the San Francisco 49ers on November 5, 2017 at Levi's Stadium in Santa Clara, CA. (Photo by Robin Alam/Icon Sportswire via Getty Images) less
SANTA CLARA, CA - NOVEMBER 05: San Francisco 49ers Defensive Coordinator Robert Saleh talks into his headset during an NFL game between the Arizona Cardinals and the San Francisco 49ers on November 5, 2017 at ... more
Photo: Icon Sportswire / Icon Sportswire Via Getty Images
Top: Defensive coordinator Robert Saleh talks to his players in Houston. Above: Special-teams coordinator Richard Hightower gets the picture.
Top: Defensive coordinator Robert Saleh talks to his players in Houston. Above: Special-teams coordinator Richard Hightower gets the picture.
Photo: Michael Zagaris, Getty Images
SANTA CLARA, CA - AUGUST 31: Special Teams Coordinator Richard Hightower of the San Francisco 49ers stands on the sideline prior to the game against the Los Angeles Chargers at Levi's Stadium on August 31, 2017 in Santa Clara, California. The 49ers defeated the Chargers 23-13. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images) less
SANTA CLARA, CA - AUGUST 31: Special Teams Coordinator Richard Hightower of the San Francisco 49ers stands on the sideline prior to the game against the Los Angeles Chargers at Levi's Stadium on August 31, 2017 ... more
Photo: Michael Zagaris, Getty Images