Yean will serve as the opening pitcher for the Nationals in Monday's game versus the Blue Jays, Kyle Williams of TheBanner.com reports.
Yean will draw his first MLB start after tossing 5.1 scoreless innings covering his first three appearances with Washington. He'll likely cover an inning or two before giving way to left-hander Andrew Alvarez, who is in line to work as the Nationals' bulk reliever.