Heh, posted in the other thread but Keith Smith seems to have refuted this.
https://mobile.twitter.com/KeithSmithNBA/status/839571981628502017
Despite the new pic floating around of Larry Sanders in a BOS practice jersey, no indications he had a second workout with Celtics recently.
I'm a KO supporter but unfortunately for him he has done nothing this year to prove is that the spot is his. Is Larry Sanders capable of becoming our 3rd to 4th big? Personally I don't see why not.
Ha TP.
By the way, how did this Keith Smith guy blow up all of a sudden? Wasn't he just a barely reliable Reddit guy at one point not too long ago? Isn't this the infamous "Smitty" character? It seems like since a bit before the trade deadline several sports/NBA platforms have picked him up and have been giving him airtime.
He's originally a RealGM guy I believe. He made up a rumor over the summer about Blake Griffin (and I mean that seriously -- he made it up). Then Celticsblog hired him as a front page writer, so he gets retweeted by them a lot, and voila! The stamp of officialness!
I saw his tweet through bleacherreport's NBA page didn't know that was the same guy as the Blake Griffin Smitty lol.
I usually use Bleacher Report to outsource my deep Twitter mining. 
Pretty sure he signed up for scouting school and was giving realgmers updates at summer league this year from stuff he saw/heard etc...
Right, but he either was played for a fool by people he talked to, jumped to real aggressive conclusions, or made things up. The Blake thing was nonsense from the beginning, and it was obvious nonsense. The entire thing was premised on the fact Ainge was going to San Diego (which, I guess was a scoop but felt a little bit like stalking). The rumor said he was going to San Diego to negotiate an extension for Blake, when it was not remotely difficult to learn that Ainge has a daughter and grandchildren in San Diego, and was in fact seeing family on one of the few off weeks on a NBA GM's calendar. But when Ainge tweeted from San Diego, it was taken as confirmation of the absurd Blake rumor, and then he just helped it snowball from there. I wasn't completely sure about Smith prior to that, but when he shoveled coal onto the Blake fire he started, when there continued to be NOTHING there (and I assure you with every TP I've earned over the years that there was NOTHING to it -- I did my own sleuthing and I promised my source to say no more), I determined he either made things up or let people make things up for him and parroted them for retweets and follows.
The only rumor I've seen him get right was Larry Sanders' first visit -- and he didn't actually break that. Someone here on Celticsblog saw it on Sanders Instagram, tweeted it at Smith, who then repackaged the info as his own "Breaking" scoop.
I'm glad he pays money to go to NBA Scout fantasy camp. I'm frankly jealous as my wife won't let me sign up. But beyond that? No, he's a dude who's throws a lot darts at the wall that sometimes have enough of a modicum of truth to them for people to believe there's a dartboard he's aiming at.