The Reds have sent pitcher Luis Castillo to the M’s for a healthy prospect package The Seattle Mariners have traded for pitcher Luis Castillo from the Cincinnati Reds for a package of four prospects, it has been announced. Interestingly, Ken Rosenthal says on Twitter that the Rangers were one of the teams “strongly in the mix” for Castillo, which is interesting, given Castillo is a free agent after next season. Castillo, 29, has been a solid top of the rotation caliber starter for the Reds since 2019. He has a 2.86 ERA in 14 starts this season despite missing time…