Riley woke with a stiff knee. Snitker stressed the details aren’t 100 percent known, but it’s enough to require sidelining the rookie slugger. The training staff just pinpointed it as a ligament issue.
After a hot start following his May 15 debut, Riley has leveled off. In June and July, Riley hit a combined .200 (34-for-170). He’s still been a threatening power presence in the Braves’ lineup, clubbing 17 homers with 45 RBIs in 66 games, though he’s hit only three home runs in his past 24 games, since June 29.