Carlos Rodon is taking things two weeks at a time. The White Sox left-hander completed his first two-week throwing program Wednesday and began another Thursday at spring training in Glendale, Ariz., as he continues his rehabilitation from shoulder surgery. The back-to-back sessions from flat ground marked a first for Rodon, who still doesn’t have a timetable for his return to the rotation after undergoing arthroscopic surgery last September to repair significant bursitis in his shoulder. “It’s going well,” Rodon said early Thursday. “I’m pretty confident going through that throwing program. It just felt healthy — for once. I’ll continue the throwing program and go from there.” Rodon, 25, missed nearly three months at the start of the 2017 season with the bursitis issue and then made 12 starts during which he went 2-5 with a 4.15 earned-run average in 69 1/3 innings. After complaining of discomfort while warming up for a Sept. 7 start, Rodon was shut down for the season. “Never really having a shoulder or arm issue, being young, I wanted to get back on the mound and help my teammates (and) maybe kind of forced the issue and went a little too quick,” Rodon said. That doesn’t figure to be the case this time as Rodon and the Sox will remain patient, a virtue Rodon said he has developed since the initial injury.