Kelly, who has been on the disabled list with a left hamstring strain since April 17, was pitching on three days' rest and is expected to need at least one more rehab appearance before rejoining the Cardinals.
Wong appears closer to a return, as he will be eligible to come off the DL on Sunday. He started at second and led off for Memphis in what was his first game since June 20. Wong, who has been sidelined by a left shoulder contusion, made an impact, too.
After doubling in his first at-bat and drawing a walk his next time up, Wong connected for a three-run homer to give Memphis an early lead. He finished 2-for-3 before being removed for a pinch-hitter in the eighth.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.