Two years ago Osuna was entering his age-20 season and had never pitched in AA. He was a fringy top-100 type. Him throwing 143 MLB innings in his first two seasons with a 2.63 ERA, 3.1 fWAR, 3.4 WPA, and 4.3 RA-9 WAR while probably sitting top-5 in reliever trade value is him turning into a very big success IMO. This is a prospect who panned out beautifully, and as low as my opinion is of AA, I think this actually turned out well.