The NBA trade deadline is fast approaching, and we all know this is where Brad Stevens does his best work. The Celtics are active and trying to make a move, but what that move is remains a mystery. We'll be tracking it all right here.

The Celtics won their third straight game on Tuesday night, this time with a new-look starting five. Boston brought Payton Pritchard off the bench for the first time all season and cruised to a 110-100 win over a shorthanded Mavericks squad.

Perhaps more importantly than the Celtics roster gaining another big man is their cap situation. By moving Simons, the organization's tax bill fell by $22.5 million, according to ESPN's Bobby Marks. Brad Stevens, president of basketball operations, effectively acquired a key depth piece for his roster while subtracting from the team's tax bill.

While the Sixers are quietly observing in the background in the early stages of trade deadline week, the rival Boston Celtics have already made a move.

The Bulls also weren’t done making moves, sending two-time All-Star Nikola Vučević to the Boston Celtics for Anfernee Simons and a second-round pick. The Los Angeles Clippers and Cleveland Cavaliers also have discussed a trade that would swap James Harden for Darius Garland, Yahoo Sports’ Kelly Iko reported.