The Mets, openly worried about closer Frank Francisco, are close to landing another late-inning option in free agent Brandon Lyon, an industry source confirmed yesterday. The agreement with Lyon should be completed and announced this coming week. Lyon, 33, split the 2012 season with the Astros and Blue Jays, and pitched quite well in both locales, totaling a 3.10 ERA in 67 appearances and striking out 63 and walking 20 over 61 innings. He picked up just one save; he has spent his 12-year career bouncing back and forth between closer (he recorded 20 saves for the 2010 Astros and 26 for the 2008 Diamondbacks) and setup man. He pitched for the Tigers in 2009. The Mets have now added Lyon, Scott Atchison and LaTroy Hawkins, the latter two to minor-league contracts, to a unit that performed exceptionally poorly in the season's first half. Francisco, entering the second year of a two-year, $12-million contract — the most money general manager Sandy Alderson has committed to a free agent since taking over the team two years ago — performed dreadfully last year, tallying a 5.53 ERA in 48 appearances, and is coming off December surgery to remove a bone spur from his right elbow. In importing three veteran relievers, the Mets could be finished renovating this area and could be close to done overall as spring training approaches. They are interested in free-agent outfielder Michael Bourn, yet they have neither been able to agree on financial terms with Bourn nor get assurance that they wouldn't lose their 11th overall selection in the 2013 amateur draft as compensation. CBS Sports, on its website, first reported that the Mets were close to signing Lyon.