Alfredo Simon will keep his turn in the rotation and pitch for the Reds in Wednesday's 7:10 p.m. ET scheduled game against Pittsburgh's Juan Nicasio. Reds manager Bryan Price said he would have more clarity on Wednesday about just how the postponement would affect the rest of the rotation.
It is expected that John Lamb, who suffered a sprained left thumb while batting against Milwaukee last Sunday, will have his next turn skipped. He is still listed as the starter for Saturday's game at Philadelphia.
"A lot of it depends on [Wednesday]. He's scheduled to play catch," Price said. "One thing I think I really wanted to do was split up him and [Brandon] Finnegan, not have the two lefties back to back, break them up. This gives us some options. It also gives the bullpen some rest."
The teams announced there will not be a doubleheader on Wednesday, nor will there be a game played on Thursday, when the teams have a mutual off-day. There is rain in the forecast for the Cincinnati area Wednesday and Thursday.
The Pirates are set to begin a weekend series against the Cubs in Chicago on Friday, while the Reds are scheduled to travel to Philadelphia for a three-game series against the Phillies.
This is the Pirates' second of three trips into Cincinnati already this season. They are not scheduled to return to Great American Ball Park until Sept. 16-18.
The postponement is the 13th in the history of Great American Ball Park, including three last season. The Reds had 18 weather delays at home in 2015, totaling 26 hours and 57 minutes.
Kevin Goheen is a contributor to MLB.com based in Cincinnati. This story was not subject to the approval of Major League Baseball or its clubs.