After losing ace Dylan Cease in free agency this past offseason, the San Diego Padres' front office decided to look for under-the-radar options to replace him. San Diego's starting group already had questions around it before they lost Yu Darvish for the year and Joe Musgrove to an injury setback. Those questions continued into the early portion of the season as offseason additions Walker Buehler and Germán Márquez continued to struggle. But one pitcher that the team signed over the offseason just made his debut for the organization, and performed very well. That would be veteran right-hander Griffin Canning, who had been rehabbing from a torn Achilles that he suffered last season with the New York Mets. Canning was activated for his first start with the Padres over the weekend against the Chicago White Sox, and he didn't disappoint. Overall, the right-hander went five innings, allowing one run, one hit and one walk while striking out seven batters.…