Rosso is a prospect, he's had one of those weird career paths. Signed by the Dodgers out of Spain (Born in DR), released in 2016, and signed by the Phillies. Big body, 6'4 230, didn't show great velocity 89-91, t93, slider and marginal change. Given his body, I want to see more current scouting reports, Phillies have had success reworking mechanics on some pitchers. His performance since joining the Phils organization suggests they've been able to rework his stuff.