The White Sox officially placed Jake Peavy on the 15-day disabled list prior to Thursday's game against Oakland with a fracture of the fourth anterior rib, which will keep the right-hander on the shelf for four to six weeks.
The White Sox recalled right-hander Deunte Heath from Triple-A Charlotte to take Peavy's place on the roster, and optioned reliever Brian Omogrosso to Triple-A and purchased the contract of right-hander Ramon Troncoso from Charlotte. The White Sox don't have an off day until Thursday, June 13, and with Peavy's Tuesday start cut short and the Sox bullpen throwing 10 2/3 innings Wednesday, the team needed fresh arms at its disposal.
Troncoso had eight saves and a 2.19 ERA in 24 2/3 innings with Triple-A Charlotte in 2013. The 30-year-old previously spent four years pitching out of the Dodgers' bullpen, which included a 73-appearance campaign in 2009 with a 2.72 ERA.
Heath has been up and down between Charlotte and Chicago over the last year, allowing eight runs on seven hits with nine walks, three strikeouts and two home runs allowed in 5 2/3 innings. In 15 Triple-A innings this year, the right-hander has a 2.40 ERA.
Omogrosso appeared in 11 games with the White Sox in 2013, compiling a 5.14 ERA in long relief and mop-up situations. He threw 2 1/3 innings in relief of Peavy on Tuesday and added a single frame of work in Wednesday's 16-inning marathon.
Peavy will be replaced in the starting rotation by left-hander Hector Santiago, who has a 2.51 ERA and 57 strikeouts in nine career starts spanning 46 2/3 innings. Peavy, who signed a two-year, $29 million deal with the White Sox last October, posted a 4.30 ERA in 11 starts with the White Sox in 2013.