Hmm... His RBI output has been dismal, but its too early in the season to call him a bust yet. In my opinion: Runs, HRs, SBs, OBP (I avoided him in Avg based leagues), he is performing in-line. I would love to see an extra SB, but he could easily snag a couple over the next week..
I suspect the RBIs will come. I was complaining about Zobrist just last week. Now the guy is literally ranked near the top.