The Pirates optioned Simon to Triple-A Indianapolis on Friday.
Dotel is slated to start Friday's game against the Cubs at Wrigley Field, Dominic Campbell of SI.com reports.
The Pirates activated O'Hearn (quadriceps) from the 10-day injured list Friday.
Montgomery earned a save against the White Sox on Thursday, allowing one hit and striking out one batter over one scoreless inning.
Cruz went 3-for-4 with a home run and an additional RBI in Thursday's 2-0 win over the White Sox.
Jones (4-6) earned the win over the White Sox on Thursday, allowing one hit and issuing two walks while striking out eight batters over seven scoreless innings.
The Pirates recalled Kelly from Triple-A Indianapolis on Thursday.
The Pirates placed Ashcraft on the 15-day injured list Thursday with right arm discomfort, retroactive to Monday.
Valdez isn't in the lineup for Thursday's game against the White Sox.
Gausman (9-12) allowed seven runs (six earned) on eight hits and two walks while striking out six over four innings to take the loss versus the Brewers on Wednesday.
So I am meh on SportsLine MLB picks so far but please check out my CBS Sports plays because then I get to manipulate numbers -- doing quite well via those SGPs with alts. And I have one for this game. But I'm fine with Cubs ML straight. Shota Imanaga has utterly owned the Bucs career. The Cubbies better take advantage of missing Pittsburgh's two best pitchers in this series, although I moved to Bears camp news with the crushing Cade Horton injury. Not sure crushing is enough.
