Senzatela (knee) threw 20 pitches in a live bullpen session Saturday, Thomas Harding of MLB.com reports.
Senzatela told Harding he felt well after the session. The right-hander is coming back from the torn left ACL he suffered in August. The hope is that Senzatela can come back at the start of May as a rotation option for Colorado, and this is a positive step in that direction.