Davey Martinez and Co. try to even things up with the Padres after last night’s loss in Nationals Park. Luis García tweaked his knee, and though he was pencilled into the Nationals’ lineup for the series finale with the Chicago Cubs in Wrigley Field, he was scratched late, but returned to play in last night’s series opener with the San Diego Padres in Washington, D.C., going 2 for 3 before he was lifted with another issue. This time it was a groin issue for the 22-year-old infielder. “He got a little bit of a groin tightness, so we’re going to…