Shane Lowry was second at 11 under after a 5-under 65, and Sepp Straka (67) was another stroke back. Defending champion Rory McIlroy shot a 3-under 67 and was tied in a large group for fourth. Get the latest D-FW sports news, analysis and opinion delivered straight to your inbox. Plus, Kevin Sherrington's A La Carte.

The good news for Mitchell is Lowry and Sepp Straka (-10) are the only players to reach double figures under par through the second round. The bad news is the group tied for fourth at 7 under features a who's who of the best players on Tour this season (aside from Scottie Scheffler, who isn't in the field).