(AP Photo/Matt Slocum)

The Nationals can sweep the Mariners today, but they’ll have to beat Japanese right-hander Hisashi Iwakuma, one of the most underrated pitchers in baseball. Iwakuma has a 2.84 ERA in 85 career games, including 71 starts, thanks to impeccable command. This season, he has walked less than one hitter per nine innings, issuing 13 walks in 149 1/3 innings. Tanner Roark will try to beat him. Talk about the game right here.