Crowder brings a lot to our team. Versatile, energy, great defender, and has made some big shots for us at time. He's also still young and just entering his prime. Jae Crowder is the type of player that fits great into Stevens system.
I'm not sure about giving him 5 years... but compared to other free agents, the money is reasonable, and we know that he fits our team system.
Obviously, would have liked to have Tobias Harris. But he would cost twice as much, and I don't think we had the cap space to offer 15m per after signing Amir Johnson. So Welcome back to the Celtics, Jae!!