Theriot was ejected in the sixth inning Sunday, after umpire Mike Muchlinski determined that he pulled his foot off the second-base bag after receiving a throw from second baseman Skip Schumaker. Theriot's heated reaction prompted a quick ejection, and in the course of his argument, he made contact with Muchlinski.
Theriot is appealing the suspension, allowing him to play until the matter is resolved. He was in the Cardinals' starting lineup for their Tuesday night game against the Mets at Citi Field.
"I've never been suspended from anything in my life," he said. "It stinks, but I guess it's one of those things. It is what it is. We're going to appeal it and hopefully get it [reduced]."
Matthew Leach is a reporter for MLB.com. Read his blog, Obviously, You're Not a Golfer and follow him on Twitter at @MatthewHLeach. This story was not subject to the approval of Major League Baseball or its clubs.