Keith Law released his top prospect rankings for 2019, and three Mariners have made the list. You can read the first part of the list here and the back half here (ESPN Insider subscription required). It’s worth noting that Law is often a little bit of an outlier; while he has his own network of sources and gets out to see prospects, it’s not a process like Baseball America’s or even FanGraphs or Baseball Prospectus, where a group of experts get together, hash things out, and come to a compromise. Law is the ruler of his own tiny principality, which might explain why some of his rankings don’t jive with industry consensus, so keep that in mind.