Phil Irwin (elbow) underwent ulnar nerve transposition surgery Wednesday in Pittsburgh.
Pirates placed RHP Phil Irwin on the 60-day disabled list.
Pirates optioned RHP Phil Irwin to Triple-A Indianapolis.
Pirates recalled RHP Phil Irwin from Triple-A Indianapolis.
Phil Irwin will make his major league debut Sunday against the Reds.
Phil Irwin struck out seven while allowing one run in 3 2/3 innings of relief Monday against the Orioles.
Pirates purchased the contract of RHP Phil Irwin from Triple-A Indianapolis.