Jon Heyman of CBS Sports reports that the Reds are concerned that Scott Rolen (shoulder) might not be able to return to the field this season. There is no timetable for Rolen's return and Heyman believes the situation is more dire than originally reported. "I really don't know," Reds manager Dusty Baker said Saturday when asked when Rolen would return. The 37-year-old third baseman was off to a rough start this year when he hit the shelf, batting just .174/.238/.304 with two homers and 11 RBI. Todd Frazier has replaced him in the lineup.