Ten-year pro Matt Moore will receive the start for the fourth week in a row for the Dolphins (10-6), who are making their first postseason appearance since 2008.
Head coach Adam Gase said Thursday that he wanted Moore and the rest of the team to be able to approach Sunday's game against the Steelers with tunnel vision and not worry about any other potential distractions.
"I think this week is very important for us to focus on the task at hand and not have anything that could possibly distract our guys from the game," Gase said.
Tannehill has been sidelined since the Dec. 11 game versus the Arizona Cardinals in Week 14 with a sprained ACL and MCL in his left knee. Gase cited Tannehill's lack of ability to move and protect himself in the pocket on Wednesday as a primary reason to keep him off the field.
"Just watching him move around (Wednesday), it just felt like we were still -- we still needed more time," Gase said Thursday. " It just felt it was the right thing to do just so we can move on in this week and not play this 'What are we going to do?' And just focus on what we're doing right now with Matt and the game plan to where guys can just focus on that and not worry about if there is a possibility of him coming back this week."
Moore has posted a 2-1 mark since replacing Tannehill, throwing for 721 yards, eight touchdowns, three interceptions. He has a 105.6 passer rating in four games.
For the season, Tannehill completed 67.1 percent of his passes, throwing for 2,995 yards, 19 touchdowns and 12 interceptions with a 93.5 passer rating in 13 games.