Kevin Siegrist

Kevin Siegrist (mono) due back in Cardinals' bullpen Friday

St. Louis Cardinals pitcher Kevin Siegrist (mononucleosis) is expected to rejoin the bullpen on Friday.

What It Means:

Siegrist has been on the shelf with mono since the end of June. This update comes from general manager John Mozeliak, who spoke with reporters prior to Tuesday night's All-Star Game.

The 26-year-old left-hander owns a 2.78 ERA, 0.96 WHIP and 27.20 strikeout percentage across 32 1/3 innings (35 relief appearances) this season.