Thankfully, he’s not using any gang-related language to do so: “The Celtics forward, discouraged by the lack of progress in talks with the Celtics as well as shrinking options in the free agent market, posted his frustration last night on in a series of so-called tweets. As evidenced by his comments, Davis’ angst was tweaked in part by the Celtics’ signing of free agent power forward Sheldon Williams to a veteran’s minimum contract earlier this week. A league source also confirmed that the Celtics finally started discussing numbers with Davis over the last week, and made an offer that was considered disappointing by the Davis camp.”