Abbott (shoulder) will not return this season, Gordon Wittenmyer of The Cincinnati Enquirer reports.

Abbott (shoulder) began a throwing program Wednesday, MLB.com reports.

The Reds placed Abbott on the 15-day injured list Friday, retroactive to Aug. 20, with a left shoulder strain.

Abbott (9-9) took the loss Wednesday, coughing up six runs on six hits -- including three home runs -- and three walks over five innings as the Reds fell 6-4 to the Marlins. He struck out seven.

Abbott (9-8) allowed two runs on seven hits and a walk over 4.1 innings Friday, striking out eight and taking a loss against the Giants.

Abbott (9-7) took the loss Saturday, giving up four runs on eight hits and two walks over four-plus innings as the Reds were downed 4-0 by the Rays. He struck out two.

Abbott (8-6) earned the win over the Yankees on Wednesday, allowing one run on three hits and four walks while striking out two batters over 6.1 innings.

Abbott (7-6) picked up the win over the Cardinals on Thursday, allowing two runs on two hits and six walks over five innings while striking out two.

Abbott (6-6) picked up the win Friday, allowing two runs on four hits and a walk over 5.2 innings in a 5-2 victory over the Red Sox. He struck out 10.

Abbott's next start will come Tuesday against St. Louis, Charlie Goldsmith of The Cincinnati Enquirer reports. Abbott was initially scheduled to start Sunday against the Dodgers.