Gray was one of the rookie free agents many were expecting to perform well in camp. Coming out of Southern Mississippi, the Steelers were reportedly excited by his 39 reps at 225 pounds on the bench press at the Combine.
There was some speculation Gray's development this year may have been enough to release veteran NT Chris Hoke.
Gray is another release from the highly skilled rookie free agent class in the last three days. TE Miguel Chavis was waived/injured Saturday, and they released TE Vaughn Charlton, CB Kevin Dockery and WRs Eric Greenwood and Kenneth Moore. RB Baron Batch was placed on the Steelers injured-reserve list.
Gray had two tackles in three preseason games.
The move put the Steelers roster down to 83, with three more cuts pending to be in compliance with the league's deadline of 4 p.m. ET today to trim rosters to 80.