Riggins on Marmol: It’s his delivery

SAN DIEGO — When it comes to Carlos Marmol’s command issues this season, and escalating contract issues the next two, the Cubs have a simple response: ‘‘He’s our closer,’’ pitching coach Mark Riggins said. And when it comes to those who say Marmol needs to go back to a setup role or to another team, the response is almost as clear from Marmol: ‘‘I don’t care what other people say,’’ said Marmol, whose $20 million closer contract he signed in the spring includes $7 million and $9.8 million salaries the next two years. ‘‘I don’t care about me. I try …