Quintana (thumb) threw a 30-pitch bullpen session Monday, Bruce Levine of 670TheScore.com reports.
After tossing 38 pitches Saturday, Quintana once again felt good after throwing 30 pitches Monday. Barring any setbacks, he should be on track to make his season debut in the near future. He'll likely try building up his pitch count in upcoming throwing sessions since he's been solid through his first several outings. However, no timetable has been announced for his return.