The team had not announced any transactions Tuesday as of 5 p.m. ET.
The Patriots shouldn't expect much from Harrison at this stage in his career. After playing in 587 snaps previous year, Harrison was only at 40 snaps before his release.More news: Josh Rosen could be second QB to force his way from Browns
The Steelers may have had hopes of releasing Harrison only to pick him back up this week, but their roster roulette backfired this time.
While Harrison's role has been reduced dramatically in Pittsburgh, he could still make a splash for the Patriots defense just in time for a Super Bowl run. Many felt that Belchick signing former Jets linebacker Davis Harris fell in line with that, even as Harris has collected dust much of the season on the bench.
This also could be a signing with the Patriots' first playoff opponent in mind. Marquis Flowers played great in Sunday's win over the Bills in Van Noy's absence, leading the team with 10 tackles and 2.5 sacks, but the Pats could use more depth at linebacker without Dont'a Hightower.More news: Modi praises Adityanath for rising above Noida superstition
He has one sack and three tackles on the year.
"We make the decisions that we feel give us the very best chance to win".
The Patriots and Steelers are vying for home-field advantage throughout the AFC playoffs and are locked in to the top two spots in the conference.More news: Family of Convicted Indian Spy Arrives in Pakistan to See Him
The Patriots defeated the Steelers 27-24 in Week 15.