Manager Joe Espada said Friday that Pena (hamstring) will "hopefully" run the bases this weekend, which would be the final step in his rehab program before starting a rehab assignment, Matt Kawahara of the Houston Chronicle reports.
The shortstop has been on the shelf nearly four weeks due to a strained hamstring, but he's close to being cleared for game action. Pena shouldn't require a lengthy rehab assignment before rejoining Houston's active roster, so a return in mid-May remains on the table.