The Mariners continue discussing an extension with Felix Hernandez, Ken Rosenthal of FOX Sports reports. The sides aren’t close to a deal, and are now “dancing.” However, Seattle is at least considering a four-year, $100MM offer, according to Rosenthal. It’s not clear if the Mariners have offered a nine-figure deal to Hernandez, whose current contract expires at the end of the 2014 season. The 26-year-old Octagon client would presumably want a longer commitment, as Rosenthal points out. Here are more of Rosenthal’s notes from around MLB…

• The Mariners’ willingness to add veterans approaching free agency suggests GM Jack Zduriencik senses an urgency to win now in the view of some rival executives.
• Justin Upton won’t be traded for Chase Headley, an official from one of the teams involved told Rosenthal. Headley is two years away from free agency, however, and Rosenthal suggests that the Padres figure to move him eventually. Upton, another trade candidate, is under contract through 2015.
• The Diamondbacks and Rangers haven’t revived Upton-centered trade talks since the Mariners’ failed attempt at acquiring the 25-year-old right fielder. Rosenthal reports that the sides agreed to “move on.” When the teams were last in contact the Rangers offered a four-played package led by Mike Olt that would have included shortstop prospect Leury Garcia and either Martin Perez or Cody Buckel plus a fourth prospect.
• The Rangers continue pondering one significant move. They are viewed as possible destinations for Kyle Lohse and Michael Bourn, and could also pursue relief help. The Rangers discussed right-handed reliever Tyler Clippard with the Nationals earlier this offseason, Rosenthal reports.
• The Nationals could trade Clippard or Drew Storen now that they’ve signed Rafael Soriano. One rival executive suggested Washington could sign Lohse, but Rosenthal writes that a deal with free agent right-hander Javier Vazquez seems more likely.