Greinke (COVID-19 injured list) resumed throwing off flat ground Monday and could be ready to complete a bullpen session this weekend, Danielle Lerner of the Houston Chronicle reports.

When Greinke was placed on the IL on Aug. 31, manager Dusty Baker didn't disclose whether the right-hander tested positive for the virus. In any case, Greinke appears to be in the midst of a slow buildup program, as he won't be immediately activated this week when first eligible. If Greinke is able to complete a side session over the weekend, he could slot into the rotation during next week's series in Texas, though Baker may want to see the veteran complete a simulated game or face hitters in live batting practice before the Astros formally activate him. Once Greinke is back in the fold, he could be part of a six-man rotation now that Jose Urquidy has returned from the shelf after an extended absence.

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