You don't need much offense to generate WAR from 2B or CF. Wong and JBJ have been around for a while, they are usually worth about 2.0 oWAR per year. Wong is already at 0.6 oWAR (bref) this year. JBJ hasn't done anything but it's not like he's running well in the negative like Hiura is. Hiura is the one who is really killing the offense, since we're worst in the league at the most important offensive position. Shaw, Urias, McKinney, JBJ etc. are all replacement level so far which isn't great but whatever.