Marte (hamstring) began taking groundballs and swings in a batting cage Friday, Alex Weiner of Arizona Sports reports.
As Marte begins baseball activities, his timeline has become more clear. Diamondbacks manager Torey Lovullo estimated a return for the final week of April or the first week of May. That provides much more definition than the "series of weeks" comment Lovullo offered up earlier this week. While Marte works his way back, Tim Tawa and Garrett Hampson will share second base.