Damian Lillard is looking at a mid-to-late March return, and at that point there will be less than a month left in the regular season.
Porter played only nine games this season before undergoing back surgery, and he was originally expected to miss the remainder of the season.
Kevin Durant has started doing more on-court work recently as he recovers from the sprained MCL he suffered in his left knee last month.
In addition to Simmons, the Nets have also been without Kevin Durant due to a sprained MCL, but his return appears sooner than later.
The veteran guard played in 14 games for the Cavaliers after being traded there from the Los Angeles Lakers in January.
The New York Knicks announced on Friday afternoon that Derrick Rose will undergo a procedure on his right ankle.
Chris Paul injury is a potentially brutal blow for the Suns, who have the best record in the league and are probably the title favorites.
Zion Williamson hasn't played a single game this season, and the New Orleans Pelicans' franchise player might need a second foot surgery.
Chris Paul injured his right hand in the third quarter of the Phoenix Suns' 124-121 win against the Houston Rockets.
Anthony Davis injury is expected to be last for at least the next four weeks with a mid-foot sprain, the Lakers announced.