Nats place RHP Trevor Williams (flexor muscle) on IL

(Photo credit: Brett Davis-USA TODAY Sports)
The Washington Nationals placed right-hander Trevor Williams on the 15-day injured list Tuesday due to a right flexor muscle strain.

Williams, 32, had been scheduled to start Tuesday's game against the visiting New York Mets.

He is 5-0 with a 2.22 ERA this season, allowing two earned runs or fewer in nine of his 11 starts.

The Nationals called up left-hander DJ Herz from Tri