Trout has actually been ready to go since the all-star break, but they held him back on purpose until after the trading deadline so that they could say getting him back is like a big splash acquisition. Same for Rendon.
I heard this from a reliable source. A guy who sets up the post-game wine bar for Maddon. Okay, not THE guy, but his cousin. Okay, not his cousin, but the guy who cuts his cousin's hair.
It's legit.