Nova has thrown four bullpen sessions this spring and has been able to work in breaking balls, The Westchester Journal News reports. Nova has reported that his arm has felt great after each session and is encouraged by his progress as he rehabs from Tommy John surgery. The 27-year-old is still a while away from returning to game action, but as long as everything continues to progress according to plan, Nova should be able to make his season debut on the earlier end of the May-to-June timetable.