Cashner went back out for the top of the sixth inning and threw four pitches before exiting, having allowed three runs on nine hits against the Mets.
Cashner did not allow a first-inning run on Sunday, but his ERA in the opening frame is 7.71 -- far higher than any other inning. In fact, first-inning damage has been a problem for Padres pitchers all season, as they've allowed 21 first-inning runs in 32 games.
"We've actually had conversations internally about what we've got to do to get out of the chute better than we have," Green said. "I think we really need to generate an attack mentality that hasn't quite been there for us consistently as a club."
• Green never had the opportunity to meet the legendary Tony Gwynn, who would have turned 56 on Monday. Instead he admired Gwynn from afar.
• 19 facts about the career of Tony Gwynn
"He was unbelievable, really hit to all fields, his feel for the barrel -- today there are very few hitters that are even anything like him that can just manipulate the barrel," Green said.
So how would Green -- one of the game's most forward-thinking managers in terms of defensive positioning -- have shifted against Gwynn?
"I'd have to look at a lot of charts," he said. "I would have tried to get 12, 13 defenders out there."
AJ Cassavell covers the Padres for MLB.com. Follow him on Twitter @ajcassavell. This story was not subject to the approval of Major League Baseball or its clubs.