Thomas has missed the Cavs' first 36 games of the season due to a hip injury.
Thomas has been out of action since Game 2 of last year's Eastern Conference Finals when he suffered a hip injury. It was actually a re-aggravation of a right femoral-acetabular impingement with labral tear he suffered during a March 2017 game against the Minnesota Timberwolves.
When the Cavaliers initially agreed to the deal with Boston for Irving, concerns with Thomas' physical led to the trade being held up for a few days until the Celtics added a second-round draft pick to the package.
During his introductory press conference with the Cavaliers in September, Thomas noted how excited he was to play on the same team as LeBron James.
"I'm excited to play with the best player in the world," Thomas told reporters. "I've been in situations before where things have been a little tough and we haven't had the best players and we just kept fighting and worked with what we had. ... Being put in this situation on the court is everything."
Adding Thomas to the mix is only going to make Cleveland's already-electric offense more dangerous. The Cavs rank third in offensive efficiency this season with 113.7 points per 100 possessions, per Basketball-Reference.com.
Thomas set career highs with 28.9 points and a shooting percentage of 46.3 in 76 games with the Celtics last season.
James and Kevin Love are the only Cavaliers players averaging more than 15 points per game this season, so adding another dynamic shooter to the mix will help everyone else elevate their performance
The Cavs started 5-7 this season before winning their next 13 games.
Although Cleveland is in the midst of a three-game losing streak, it is third in the Eastern Conference at 24-12, trailing the Celtics by four games for first place and the Toronto Raptors by one game for second.
With one of the most explosive offensive players in the game at their disposal, the Cavs have an opportunity to make their move during the second half of the season.