• Hot Stove Tracker
Valdez made 25 relief appearances for the Angels last season, compiling a 4.24 ERA through 23 1/3 innings. The 26-year-old Valdez initially signed with Detroit as a free agent out of the Dominican Republic in 2009, and his contract was purchased by the Angels in June.
De Los Santos, 24, has pitched just 7 1/3 innings in the Majors, allowing eight runs in that span. He split the 2016 season between the Nationals and Reds organizations -- posting a 2.81 ERA in 57 2/3 innings in the Minors.
Chad Thornburg is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.