The Padres might play five games without Manny Machado and Fernando Tatis Jr. They might play 15. Or, per Dr. David David Chao, it could be many more games. The former Chargers team physician, writing for Sports Injury Central, targets late July for each player’s return. Whatever the total, call it a midseason test. The Padres will try to hang tough while lacking both the National League’s best player this season in Machado, who sprained his left ankle Sunday, and the league’s third-place MVP vote-getter last year in Tatis, who’s recovering from the left wrist fracture sustained in the offseas…