Rusin (shoulder) threw 30 pitches Tuesday and is close to starting a rehab assignment, Nick Groke of the Denver Post reports.
Rusin has been out since mid-June with a shoulder strain, but it seems his recovery from that injury is moving along nicely. The left-hander primarily acts as a long reliever, though, so he'll likely need to ramp up his pitch count during the impending rehab assignment before a return from the disabled list can come into view.