Harris (undisclosed) is not listed on the Week 1 injury report Wednesday.
Harris dealt with an unspecified injury last month but is fine for Sunday's season opener against the Cardinals. He's expected to fill the WR3 role behind Ladd McConkey and Quentin Johnson this season, but the Chargers also figure to use plenty of TE-heavy sets with Charlie Kolar, Oronde Gadsden and David Njoku.