<p>Putting pen to paper finally happened Tuesday, and — just like that — the Bulls officially had the 25th head coach in their history.</p><p>Sorry, Trail Blazers.</p><p>It felt as though Tiago Splitter, 41, was going to lose his ‘‘interim’’ tag and stay with the Blazers after their season ended in the first round of the Western Conference playoffs. But bizarre financial decisions from their ownership group and the lack of a solid commitment opened the door for the Bulls to steal him.</p><p>They did, and Splitter will have his introductory news conference Wednesday.</p><p>‘‘We are excited to welcome Tiago to the Chicago Bulls,’’ executive vice president of basketball operations Bryson Graham said in a statement. ‘‘Throughout our process, Tiago stood apart for his basketball intellect, his ability to connect with and develop players and the way his teams compete every single night.