"I'm throwing off the mound Monday -- Monday or Tuesday, depending on the schedule," Wainwright said. "Then the next one will be a live session."
Wainwright (12-5) said that the way his arm is feeling now is the best it has felt since the first three innings of his July 22 start in Chicago. He made three more starts after that outing against the Cubs -- facing the Reds, Braves and Pirates -- but allowed nine runs on 15 hits in 11 innings.
"I threw a sinker today that actually sank, and it had late action and I went, 'That's what it feels like. That's nice,'" Wainwright said.
Manager Mike Matheny described Wainwright's throwing from flat ground on Saturday as "a step in the right direction."
• Triple-A Memphis has had a historic season, going 91-50, but the Redbirds go into their Pacific Coast League American Conference Championship Series on Saturday night trailing the Colorado Springs Sky Sox, 2-1, in the best-of-five semifinal series.
Memphis rallied late in Game 3 on Friday night, scoring seven runs in the eighth and one in the ninth, but lost, 16-15, at Colorado Springs.
The Redbirds need a win on Saturday night to extend the series to a fifth game.
• The Class A Peoria Chiefs' season came to an end on Friday night with an 8-5 loss to the Quad Cities River Bandits in Game 3 of the Western Division playoff series.
The Chiefs, who entered the playoffs as a wild card team, won Game 1 of the best-of-three series but then lost the next two games.
Nate Latsch is a contributor to MLB.com based in St. Louis.