And unfortunately, according to an announcement from the Cardinals, Arenado isn't alone on the injured list. Brendan Donovan is being placed on the injured list, retroactive to August 15th, with a left groin strain.

The Cardinals' fading playoff hopes took another hit as the team placed All-Star second baseman Brendan Donovan on the IL.

This article was originally published on www.si.com/mlb/cardinals as Cardinals' Brendan Donovan Gives Statement About Injury Concern. The St. Louis Cardinals are missing one of their most important pieces right now.