After giving up 7 runs in 1 2/3 innings on Monday, Joe Kelly met with Red Sox manager John Farrell and pitching coach Carl Willis on Tuesday morning to discuss a plan.
"I contend and strongly believe that his curveball is a major weapon that's got to be used in his pitch mix," Farrell said, per the Boston Herald.
Kelly did well in his start against Texas on May 21, when he went to his curve often.
"He made a very tangible adjustment after three innings of work, when he went to his curveball more than his slider and slowed them down and had some quick and efficient innings. It's part of the education process of Joe as a pitcher, what makes him most effective," Farrell said.