Bush spokesman Freddy Ford says the procedure on Bushs left knee took place Saturday at Rush University Medical Center in Chicago.
Ford says the ex-president and his wife Laura were on their way back to Dallas on Monday morning.
Fort says this operation and the one May 24 were both outpatient procedures performed by the same doctor.
Ford says Bush is looking forward to getting back on his mountain bike in a few weeks.
Bush, who recently turned 68, is known as a fitness enthusiast.
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