Thomas can play LF against LHP. Robles is turning a corner. Give him CF
I don't know that Robles is turning a corner, but he plays a good CF. Maybe he is a weak-hitting Jim Busby, but he covers ground, knows when to leap and dive, and he has a good arm.
Robles ought to hit ahead of Fox, at the least. Robles has a chance of getting a hit, like the double last night. Fox is hopeless. (I check on Fox as a minor-leaguer. He is a .240 hitter in AA who barely touched AAA in any organization)