Reds activated RHP Kevin Shackelford from the 10-day disabled list.
Reds designated RHP Kevin Quackenbush for assignment.
Jason Vargas (hand) is set to make his Mets debut on Saturday in San Diego.
Tuesday's game between the Orioles and Rays has been postponed due to inclement weather in Baltimore.
Orlando Arcia (ankle) remains out of the Brewers' starting lineup on Tuesday night.
Rockies designated RHP Zach Jemiola for assignment.
Rockies optioned RHP Scott Oberg to Triple-A Albuquerque.
Rockies purchased the contract of RHP Brooks Pounders from Triple-A Albuquerque.