Former President George W. Bush had knee surgery in Chicago over the Memorial Day weekend, NBC Chicago reported Tuesday. The surgery was said to be successful.

"He underwent a successful partial knee replacement on Saturday in Chicago," Bush communications director Freddy Ford told POLITICO in an email. "It was an outpatient procedure and he was able to walk up and down a flight of stairs just a couple hours after the surgery. He came back to Dallas yesterday where he is recovering quickly at home."

Bush's surgery took place Saturday at Chicago's Rush University Medical Center. He was able to return home to Dallas Monday.

Bush was accompanied by his wife and a Secret Service member during his surgery. After the surgery was complete, Bush rested in a hotel and was monitored by doctors.

Which knee Bush had replaced is unknown, but a 2004 report in Time Magazine said Bush had a torn meniscus in his knee.

Bush stopped jogging in 2004 and started mountain biking instead because of his bad knee.

He was also diagnosed with runner's knee in 2003. MRIs showed no tears or abnormalities, so it's possible that things got worse in his knee over the years.

Bush remains active with his mountain bike, hosting the Warrior 100K bike ride benefiting wounded soldiers each year.

Last summer, Bush had heart surgery to fix a blockage in his heart.

Bush, 67, has maintained a low-key life in recent times. During the September 11 Memorial Museum opening, Bush declined because he thought it would be too emotional for victims' families.

Rush is highly regarded as one of the best hospital's for orthopedic surgery in the country. It's no surprise that Bush used Rush for the surgery. It is the same hospital that Chicago Bulls' star Derrick Rose had knee surgery in 2012 as well as an additional knee surgery last November.

Besides mountain biking, Bush is an avid golfer as well.