The left-hander got the first two outs of the sixth inning, then walked B.J. Upton. After delivering the final pitch to Upton, Ryu grimaced off the mound and pointed to the back of his leg. With trainers and manager Don Mattingly out to the mound as Ryu tried to stretch.
Having already thrown 97 pitches in the game, Ryu was immediately removed from the game in favor of Jamey Wright, who got the final out of the inning to keep the Dodgers deficit at 3-2.
Ryu walked off under his own power.
With Monday's pending off day, Ryu will have an extra day of rest before his next scheduled start, provided he is able to answer the bell next Tuesday against the Padres at Dodger Stadium.
Ryu on if he will be able to make his next start: "It's too early to tell" #Dodgers— David Vassegh (@THEREAL_DV) August 14, 2014
The Dodgers planned to move newly-acquired Kevin Correia to the bullpen after his spot start on Monday, but that could change quickly.
Manager Don Mattingly said after the game that Ryu would get an MRI and meet with team physician Dr. Neal ElAttrache after the team gets back to Los Angeles on Thursday night.
After the game, Atlanta optioned relief pitcher Juan Jaime to Triple-A Gwinnett. A corresponding move will come before Thursday morning's series finale.