SOUTH BEND, Ind. — The Notre Dame offense the past four years hasn’t much resembled the squads Brian Kelly coached at Cincinnati and Central Michigan.

Not even close.

The Irish are on pace to be the worst offense Kelly has had in 10 years of coaching at the FBS-level and may have hit rock bottom in the second half Saturday against USC with the Irish unable to do anything behind backup quarterback Andrew Hendrix after starter Tommy Rees went down with a neck injury.

Even with Rees expected to play Saturday at Air Force (1-6), there are concerns about the Irish offense, which is ranked 85th in the nation in total offense at 374.3 yards a game.

That’s the worst output for the Irish in four seasons under Kelly, and markedly worse than last season when the Irish averaged 412 yards a game, which was still only 54th in nation.