PHOENIX (AP) -- The Arizona Diamondbacks have acquired right-hander Jason Marquis from the Washington Nationals, giving them another veteran arm for the their rotation.
Arizona sent minor league infielder Zachary Walters to Washington for Marquis, who is 8-5 with a 3.95 ERA in 20 starts this season. Marquis was scheduled to start Saturday night for the Nationals against the New York Mets.
Diamondbacks general manager Kevin Towers also says the team has recalled reliever Ryan Cook from Triple-A Reno and placed left-hander Alberto Castillo on the disabled list with shoulder tendinitis.
The 32-year-old Marquis also has pitched for Atlanta, St. Louis, Colorado and the Chicago Cubs in 12 major league seasons.