Jonas Valanciunas, for a long time, had not been able to fulfill the potential that was expected of him when the Raptors used their 2011 lottery pick on him. He wasn't necessarily bad at all - he was just a good player on a bad team. However, as the team grew, his minutes decreased, and his level of play with them.
He was also one of the victims of Toronto's infamous "GoDaddy Curse", an affliction on the playing ability of any player who does a commercial for website-building website, GoDaddy.com.
Up until pretty much the 2017-2018 NBA season, Valanciunas had not been playing nearly as well as a former number 5 overall pick should have been playing. The Raptors were patient with him though, and extended him for four years in 2015.
However, as of late, the Lithuanian big man has been showing Raptors fans a new side of him. He's been doing a better job protecting the rim, has extended his range to the point where he is a legitimate three-point shooting threat when left wide-open, and is being just as dominant with his back to the basket as he always has been.
Behind JV in the depth chart is his fellow veteran center, one Greg Monroe. Monroe has been a good piece at the 5 for, among others, the Pistons, Bucks, and Celtics in past years. In Toronto he hasn't quite had the chance to play, being the third man behind Serge Ibaka and Jonas Valanciunas.
In his limited playing time, "Moose" (Monroe's nickname) has been fantastic for the Raptors, and now that JV will be out for at least a month with a dislocated thumb, Moose has the chance to prove that he belongs on the team.
Expect big showings from Greg Monroe in the next month or so.