The New York Giants stuck with quarterback Eli Manning through the 2018 season, but will he still be the starter next season?General manager Dave Gettleman declined to offer any such assurance on Wednesday, two days after having what he termed an “extensive, no-holds barred” conversation with Manning.”I’m committed to making the best decision in the interest of the Giants,” Gettleman told reporters. “We’re in the evaluation process. … Everything is on the table for us.”Gettleman said Manning, who turns 38 on Thursday, sought out the discussion after the Giants finished season 5-11.”We’re trying to build sustained success. That takes brutal honesty and some tough decisions,” said Gettleman. “… It wasn’t like he was called to the principal’s office. He came to see me.”Manning has started 230 of 232 games he’s appeared in since joining the league in 2004. He has one year left on his contract, with a base salary of $11.5 million.Manning finished the season with 4,299 yards, 21 touchdowns, 11 interceptions and completed a career-best 66 percent of his passes.Third-year pro Alex Tanney and rookie Kyle Lauletta are the only other quarterbacks on the roster, though Tanney’s deal was for only one season.