Tennessee Football on Wednesday night issued its first availability report of the season, ahead of Saturday night’s SEC opener at Oklahoma. No. 6 Tennessee (3-0) and No. 15 Oklahoma (3-0) are scheduled for a 7:30 p.m. Eastern Time start Saturday in Norman. The game will be broadcast by ABC. The Vols last week were without starting left tackle Lance Heard, running back Cam Seldon, edge rusher Jordan Ross and defensive lineman Caleb Herring. It was a second straight missed game for Seldon, the sophomore running back who played in the season-opening 69-3 win over Chattanooga on August 31 at Neyla…