The veteran center signed a four-year contract with the Houston Rockets this offseason worth $36 million and that deal included a 15 percent trade kicker in the event he was traded. League sources tell MassLive that Theis waived that bonus money (worth $1.2 million) in order to help facilitate the deal to Boston for Dennis Schroder, Enes Freedom and Bruno Fernando. “The Theis move came about really late,” Stevens said. “Initially, we had talked to them a couple times over the past few days but that came about very late. We did not think that there was going to be anything there and, in the last 20 minutes or so (before the deadline), that materializes as the whole move. Obviously, didn’t necessarily anticipate that in the early part of the day but had our eyes on Theis.”