BOULDER— The final countdown has begun for the four seniors from the Colorado men’s basketball program. This week Josh Fortune, Derrick White, Xavier Johnson, and Wesley Gordon will play their final two home games for the Buffaloes, with CU hosting Stanford on Thursday before completing the regular season on Senior Day Saturday afternoon against Cal. Of that quartet, only Johnson and Gordon played their entire careers in Boulder, with both players arriving for the 2012-13 season and enduring separate redshirt seasons along the way.