The Nationals placed Law on the 15-day injured list Saturday due to a right elbow flexor strain, Spencer Nusbaum of The Washington Post reports.
Law has not allowed a run over his last six outings, and across 61 appearances this season he has a 2.85 ERA and 1.19 WHIP across 75.2 innings. It's unclear how severe the injury is, but he will get an MRI on Monday to determine how long his stint on the IL will be, per Nusbaum. With Robert Garcia going on the bereavement list, the Nationals promoted Joe La Sorsa and Joan Adon in corresponding moves.