Whether Tannehill opts for surgery or not, he will miss "significant" time with his left knee injury, league sources told the Miami Herald on Friday. Several doctors will be consulted, including renowned orthopedic surgeon James Andrews.
An MRI exam revealed Tannehill did not suffer ligament damage when he went down and hyperextended the knee during practice. His left knee buckled while he scrambled without contact.
Reconstructive surgery to a knee ligament generally sidelines an athlete for nine to 12 months. Tannehill suffered a sprained ACL and MCL in the same knee last December but did not have surgery.
The Dolphins and Tannehill will decide in the coming days whether Tannehill opts for weeks of rest and treatment -- potentially six weeks to two months -- with the intent of playing this year or instead undergoes season-ending knee surgery.
"Everything is on the table right now," Gase told reporters Friday. "We're going to talk to a lot of people."
Gase said that he hasn't thought yet about adding another quarterback at this time.
"We're trying to make sure we have all the right information before we make a decision," Gase said. "Nothing is off the table ... We'll see where we go from there because I've got to figure out what's going on with Ryan. We'll make a decision after that."
Meanwhile, Matt Moore said he plans to be "ready if need be" as the Dolphins' starting quarterback in the wake of Tannehill's injury.
Moore told reporters Friday that he is confident and comfortable in taking over as the starter.
"I've done this before in stepping up and getting ready if need be," Moore said, via ESPN. "So that's as much as I know and kind of the attitude I have moving forward. It stinks (with Tannehill being injured). But I thought today was a good practice. Guys were popping around and pretty competitive."
Tannehill watched a portion of practice from inside the practice facility with his left knee in a brace and propped up on a chair, according to the Fort Lauderdale Sun Sentinel .
"He's obviously waiting, and we all are," Moore said. "Nobody knows what's going on, but he seems to be in good spirits. He was here watching tape with us yesterday with all of us and hanging out. So it was good."
The eighth overall pick of the 2012 draft, Tannehill completed 67.1 percent of his passes last year, throwing for 2,995 yards, 19 touchdowns and 12 interceptions with a career-best 93.5 passer rating in 13 games.
Moore posted a 2-2 mark last season in place of Tannehill.
Cutler joined Fox Sports as a TV analyst in May, but sources told ESPN that Cutler would be willing to delay his broadcast career for Gase, who was the quarterback's offensive coordinator with the Bears in 2015.
Kaepernick is a free agent under scrutiny after failing to stand for the national anthem last year in his final season with the San Francisco 49ers.