Pirates designated RHP Duke Welker for assignment.
Duke Welker underwent Tommy John surgery Thursday.
Pirates optioned RHP Duke Welker to Triple-A Indianapolis.
Pirates acquired RHP Duke Welker from the Twins in exchange for LHP Kris Johnson.
According to Jeff Passan of Yahoo! Sports, the Twins have returned Duke Welker to the Pirates.
Twins acquired RHP Duke Welker from the Pirates to complete the Justin Morneau trade.
Pirates recalled RHP Duke Welker from Triple-A Indianapolis.
Pirates optioned RHP Duke Welker to Double-A Altoona.
Pirates purchased the contract of RHP Duke Welker from Double-A Altoona.