Two comments in response to your posts in here:
1) I disagree that it's an easy mistake to make. It's actually a mistake that's very easy to not make. Most of us have been in multiple leagues for multiple years and never done it. It's a mistake that's the result of carelessness.
2) I think you're either overvaluing the 20th overall pick or undervaluing Trent Grisham. KATOH had him 8th on its top-100 in February, and the FG guys have a 50 FV value on him, and listed him as in consideration for their top-100. The other OFs they had in his tier: Heliot Ramos, Jesse Winker, Seuly Matias, Corey Ray, Christin Stewart. I'd personally rather have him than multiple guys taken in that spot in the draft last year, and if I were Jim I would have chosen to drop Yadier Alvarez instead.