Heaney (elbow) underwent an ultrasound on his UCL and was told it is healing, but is still unsure of when he will resume throwing, Alden Gonzalez of MLB.com reports.
Heaney landed on the disabled list in early April due to his damaged UCL. His progress after the stem-cell treatment he received six weeks ago is encouraging, but he'll need to continue improving in order to avoid Tommy John surgery completely.