No one on the Bulls’ roster is safe, and the players have had to deal with that reality since long-time Bull Luol Deng was traded Monday to the Cleveland Cavaliers. ‘‘Anything is possible,’’ vice president of basketball operations John Paxson said when asked recently if more trades are coming. And while Paxson said there were no definitive moves on the horizon, there have been growing rumors, with Kirk Hinrich and Mike Dunleavy the latest Bulls reportedly drawing interest. ‘‘The important thing is to lock into what we have to do to win — to improve, to chase excellence,’’ coach Tom Thibodeau said of those rumors before an 81-72 win over the Milwaukee Bucks on Friday night. ‘‘Normally this time of the year, that’s sort of the nature of pro sports — everybody talking about the possibilities. Every team has to deal with it. The teams that are able to focus and not get distracted, those are the ones that are successful. ‘‘In this league, there’s always something. You can find something or you can find a way to get it done. I would rather our guys focus on a way to get it done.’’ Thibodeau reiterated he has been talking to his players daily, and that includes conversations with injured star Derrick Rose.