The Houston Rockets believe they have assembled a roster capable of competing for an NBA championship. Now comes the hard part.According to ESPN's latest NBA free agency intel, the Rockets have entered a championship window that may not stay open for long, putting enormous pressure on Kevin Durant and the rest of Houston's roster to deliver in the postseason.The Rockets have spent the last two seasons building one of the NBA's deepest young cores, and this summer's moves made it clear the franchise is all-in on winning now. What was once viewed as a patient rebuild has evolved into a team with championship expectations, and those expectations have only grown heading into the 2026-27 season.Houston is betting on experienceGeneral manager Rafael Stone didn't make many splashy additions durin