According to Scott Springer, per Lance's blog:
Mario Soto is heading home, leaving as Louisville's pitching coach. Ted Powers will take over the pitching coach duties for the AAA bats for the remainder of the season.
I wonder what the story is here? I thought for sure Soto would stick it out the entire year, perhaps w/ Vern Ruhle still out, he was getting fustrated by not being brought up to the Reds to fill in on the Major league level. Merly speculation there, as it could be any number of things. Perhaps he just realizes being a full time pitching coach isn't in the cards for him, and he didn't want to hurt the AAA team if he couldn't motivate himself to give his all.