The San Diego Padres have placed right-handed starting pitcher Germán Márquez on the injured list due to forearm nerve inflammation. The move was retroactive to May 2. In a corresponding move, right-handed pitcher Griffin Canning was officially activated off the IL to make his Padres debut. Márquez, 31, joined the Padres this offseason on a one-year deal after spending the first 10 years of his career with the Colorado Rockies. The hope was that getting him out of Coors Field would allow him to get back to being a great starting pitcher. So far, that hasn't been the case. Márquez has made six starts for the Padres, allowing 19 earned runs over 29.2 innings for a 5.76 ERA. He has 19 strikeouts to 12 walks while allowing eight home runs. In Márquez's most recent start on Friday against the Chicago White Sox, he allowed six earned runs across the first two innings. He ended up completing five innings, and manager Craig Stammen said he would get another start this week.…