Adam Wainwright underwent an MRI Wednesday morning after experiencing discomfort on the outside of his elbow. The good news is that Cardinals general manager John Mozeliak said Wainwright's ulnar collateral ligament is "completely fine." The bad news is that the hurler is dealing with "tennis elbow" and will be re-evaluted in a few days. The ailment helps explain why Wainwright was lifted from Tuesday's start after throwing just 92 pitches over seven shutout innings. Whether Wainwright will need a stint on the disabled list should be known before the weekend.