He bought the posh house, with crisp white décor and views of Camelback Mountain, in late 2015 before winning his 28th Olympic medal in Rio.

Phelps paid $2.53 million for the Santa Barbara-style house in the pricey metro Phoenix enclave, according to public records. The 6,010-square-foot house has five bedrooms, six-and-a-half bathrooms, and, of course, a great swimming pool.

It also has four fireplaces, a 350-bottle wine room, shiplap walls and a sports room. The house was built in 2015.

Phelps bought the house after becoming Arizona State University's assistant swim coach. It's not clear yet why he's selling. It could be he and Nicole Phelps are looking for a bigger Valley home to make room for their second son, born in February.