COSTA MESA (AP) – The Los Angeles Chargers put safety Nasir Adderley and cornerback Ryan Smith on the COVID-19 list Friday.

COSTA MESA, CA – AUGUST 02: Los Angeles Chargers cornerback Ryan Smith (23) during the Los Angeles Chargers camp practice on August 2, 2021, at the Jack R. Hammett Sports Complex in Costa Mesa, CA. (Photo by Jevone Moore/Icon Sportswire via Getty Images)

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Adderley missed the first of two joint practices with the San Francisco 49ers on Thursday, which first-year coach Brandon Staley attributed to migraines.

A second-round draft pick in 2019 from Delaware, Adderley started 14 games for the Chargers last season and had 69 tackles, one interception and one fumble recovery.

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Smith signed a one-year contract with the Chargers in March to help bolster their special teams unit, which struggled badly last season. He made four tackles in 16 games for the Super Bowl champion Tampa Bay Buccaneers last season, playing 78% of their special teams snaps.

INGLEWOOD, CALIFORNIA – DECEMBER 06: Nasir Adderley #24 of the Los Angeles Chargers looks on during warms up before the game against the New England Patriots at SoFi Stadium on December 06, 2020 in Inglewood, California. (Photo by Katelyn Mulcahy/Getty Images)

A fourth-round selection in 2016, Smith had 117 tackles, four forced fumbles, two fumble recoveries and one interception in five seasons with the Buccaneers.

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The Chargers worked out with the 49ers again Friday before breaking training camp.