The San Diego Padres are on the verge of making their second trade for a star pitcher in as many days, with the team expected to acquire righty Yu Darvish from the Chicago Cubs.  Darvish and Victor Caratini, who emerged as the right-hander’s personal catcher in Chicago, will go to San Diego once the deal is completed, sources said Monday.  In return, the Cubs are poised to acquire right-hander Zach Davies and four young prospects.  Darvish, 34, is in the middle of six-year, $126 million contract he signed with the Cubs before the 2018 season. After an elbow injury sidelined him that year, he began to come into his own in 2019, leading to a stellar 2020 campaign in which he finishing second in National League Cy Young Award voting.  Sources told ESPN on Sunday that the Padres also are finalizing a deal with Tampa Bay for former Cy Young winner Blake Snell.