CHICAGO — The Pittsburgh Pirates have dealt with numerous injuries to their star players, and they have lost another key member.The Pirates announced they placed right-handed starting pitcher Braxton Ashcraft on the 15-day injured list with right arm discomfort, retroactive to Sept. 7.Pittsburgh brought up rookie right-handed pitcher Antwone Kelly in his place, and he is with the team ahead of their series finale vs. the Chicago White Sox at Rate Field on Sept. 10.Ashcraft's injury marks the second to the Pirates' rotation, as Mitch Keller went on the 60-day injured list on Aug. 3 with a right-arm teres major muscle injury, knocking him out for the rest of the season.It's a tough blow for the Pirates, as Ashcraft has been the best starting pitcher this season, earning his first All-Star nod and proving himself amongst the best arms in baseball.Will Ashcraft Come Back This Season?Ashcraft Having Incredible Season for PiratesAshcraft has posted a 14-6 record over 28 starts, a 3.65 ERA over 165.1 innings pitched, 173 strikeouts to 35 walks, a .235 batting average allowed and a 1.09 WHIP.His injury leaves the Pirates with just three healthy starting pitchers, Bubba Chandler, Jared Jones and Paul Skenes.Make sure to visit Pirates OnSI for the latest news, updates, interviews and insight on the Pittsburgh Pirates!Add us as a preferred source on GoogleFollow