"He woke up [Monday] morning a little sore, and we backed off on him," Gonzalez said. "We might have to [wait] three or four more days. We're trying to stay away from him."
O'Flaherty has not pitched since June 8. He has been one of the Braves' most reliable relievers for the past two years. This season, O'Flaherty has a 3.97 ERA and has struck out 20 batters in 22 2/3 innings.
With O'Flaherty out on Tuesday, Gonzalez turned to left-hander Jonny Venters with the Braves leading, 4-0, and a runner on first with one out in the eighth inning. Venters gave up a single and a walk to load the bases for Alex Rodriguez, who tied the game with a grand slam.
Yankees second baseman Robinson Cano followed with a single, and Gonzalez brought in rookie right-hander Cory Gearrin to face Nick Swisher, a switch-hitter. Batting left-handed, Swisher launched a go-ahead two-run home run.