Siegrist has a left forearm strain.
The reliever, who last pitched in 2012, is returning from “Tommy John” surgery.
The St. Louis Cardinals announced Wednesday that they have placed All-Star catcher Yadier Molina on the 15-day disabled list.
Birds purchase First Baseman/ Outfielder Brock Peterson from Memphis.
Infielder Ryan Jackson has been recalled from the AAA Memphis roster. Freese had appeared in 12 spring games, batting .267.
The infielder/outfielder was 3-for-8 with a pair of doubles in three games played at Memphis during his injury rehabilitation assignment.