Manager Mike Shildt announced his retirement from the Padres on Monday, a stunner of a move after he’d helmed two of the most successful seasons in franchise history.

Mike Shildt is retiring as San Diego Padres manager with two years remaining on his contract, citing a “severe toll” the job has taken on him “mentally and physically.”

“We would like to congratulate Mike on a successful career and thank him for his significant contributions to the Padres and the San Diego community over the last four years,” said President of Baseb...