When Rhys Hoskins debuted as a left fielder last year, it was only supposed to be a temporary move to keep Tommy Joseph in the Phillies lineup (for some reason) and replace an injured Aaron Altherr. He saw much more time there in September, indicating that he was ready to play there full-time in 2018.
Then the club signed Carlos Santana, forcing Hoskins back into left field. On paper, this wasn’t necessarily a bad thing. The hope was both would be top offensive contributors with Hoskins learning enough of the position to keep him from being a black hole there.