Michael Phelps, the most decorated Olympian of all time, insisted Monday he finished swimming his last Olympic race ever, despite making the same claim four years ago to Matt Lauer Phelps announced on Today that he is packing away his Speedos and said goodbye to the world of competitive swimming "Done, done, done  and this time I mean it," he told Matt in a live interview Monday. "I wanted to come back and finish my career how I wanted and this was the cherry on top of the cake." 'This is the part of my life where I get to start a whole new chapter, which is getting to build a family with Nicole,' explained Phelps