ESPN reports the Padres acquired closer Trevor Rosenthal from the Royals:

The Royals are getting outfield prospect Edward Olivares and a player to be named later if the deal, which is pending medicals, is completed as expected, sources told ESPN.

ESPN.com

Rosenthal pitched poorly in 2019 after recovering from Tommy John surgery. In fourteen appearances this season he struck out 13.8 batters per nine IP, but was a bit wild with seven walks in 13 2/3 innings. He did save seven games. The fill ins for the injured Drew Pomeranz have not done the job.

The Padres have never won a World Series, and this short season may be their best opportunity. Good to see them make a move that could help in that regard.

Olivares is a solid minor league player, but not a star. I suspect the unknown player is the bigger prize.