The team will also ask Kelly to work more on his changeup, a pitch that the Padres feel can be a good pitch for him moving forward, but only if he is able to reduce the velocity on it.
"He needs a bigger differential [in velocity]," said Padres manager Bud Black, noting that there is not enough of a difference between his mid-90s fastball and a changeup in the high 80s.
"It's a good opportunity for him to try things mechanically, try different grips."
Kelly is 2-3 with a 6.21 ERA in his first six Major League starts. He's shown a live fastball at times and a very good curveball.
Kelly, who will start Tuesday against the Brewers in Milwaukee, has thrown a combined 66 2/3 innings between the Minor Leagues and his time with the Padres. They would like him to get more work to get him stretched out and ready for the start of Spring Training, when he will contend for a spot in the starting rotation.