Ryu (shoulder) played catch Tuesday, but has not thrown from 90 feet yet and there is no firm timetable for his return, Fox Sports' Jon Morosi reports. It's starting to look like a return sometime in May would be a best-case scenario for Ryu. David Huff was called up to start Tuesday's game, and he could theoretically hold that rotation spot until Ryu is ready to return. Scott Baker and Joe Wieland, who had nine strikeouts in his first start of the season for Triple-A Oklahoma City, are some other internal options to start while Ryu is out.