's first order of business after announcing his big fight in Japan?? Well, he ain't sprinting to the gym just yet ... he had to check in on his L.A. Clippers first.
As we previously reported ... Floyd is going up against undefeated 20-year-old kickboxer Tenshin Nasukawa at RIZIN 14 on Dec. 31 in what might be an MMA match (the 2 sides are still deciding on the rules).
After the surprise press conference in Japan on Sunday night, the 41-year-old returned to the States on Monday in time to catch the tip off in his usual courtside seats at Staples Center.