Prior to tonight's game vs. Oakland, the Chicago White Sox placed right-handed pitcher Jake Peavy on the 15-day disabled list (retroactive to June 5) with a fracture of the left fourth anterior rib, optioned right-hander Brian Omogrosso to Class AAA Charlotte, recalled right-hander Deunte Heath from Charlotte and purchased the contract of right-hander Ramon Troncoso from Charlotte.

Peavy, 32, is 6-4 with a 4.30 ERA (32 ER/67.0 IP) and 66 strikeouts in 11 starts with the White Sox this season. He left his last start on June 4 at Seattle after 2.1 IP due to the rib injury.

Troncoso, 30, is 1-1 with a 2.19 ERA (6 ER/24.2 IP) and eight saves in 21 appearances with Charlotte this season. The 6-foot-2, 215-pounder is tied for seventh in the International League in saves and has limited opponents to a .194 (18-93) average, including a .182 (10-55) mark against right-handers.

Troncoso made 175 appearances (all in relief) over parts of four major-league seasons with Los Angeles-NL from 2008-11, going 8-8 with a 3.92 ERA (86 ER/197.1 IP) and six saves. His best season came in 2009 with the Dodgers when he went 5-4 with a 2.72 ERA (25 ER/82.2 IP) and six saves in 72 appearances.

Heath, 27, is 1-0 with a 2.25 ERA (4 ER/16.0 IP) in 10 outings with Charlotte this season and also has gone 0-0 with an 11.12 ERA (7 ER/5.2 IP) in four relief appearances over two stints with the White Sox.

Omogrosso, 29, went 0-1 with a 5.14 ERA (8 ER/14.0 IP) in 11 relief appearances after being recalled from Charlotte on May 1.