The more I look into T-Ross' stats, the more I wonder why he gets more s*** than DeRozan. In the regular season, each shoot about as efficiently as the other: T-Ross' career TS% is at 53.2% vs. DeRozan's 52.9% (which shocked me). The big difference between them, at least this year? T-Ross has been a better defender than DeRozan this season, and was a similar defender in past seasons:
T-Ross: http://stats.nba.com/player/#!/203082/tracking/defense/?Season=2015-16&SeasonType=Regular%20Season
DD: http://stats.nba.com/player/#!/201942/tracking/defense/?Season=2015-16&SeasonType=Regular%20Season
Seems to me that if DD doesn't get the calls, then he's pretty much useless on the court.
Edit: This does not justify Ross' extension.