ST. LOUIS -- With the Cardinals' bullpen already in flux, the team put left-handed reliever Kevin Siegrist on the 15-day disabled list Friday due to mononucleosis.
The Cardinals removed Trevor Rosenthal from the closer role June 25, and Siegrist was in the mix to pitch in save situations along with Seung Hwan Oh and Jonathan Broxton.
The team promoted Sam Tuivailala from Triple-A Memphis to fill Siegrist's spot on the roster.