Well here's a quote from Jerry Manuel which pretty much lays it out for Evans' future:
"We'd probably like to see [Evans] defend a little better in the outfield," Manuel said after the Mets' 10-6 exhibition loss to the Tigers. "We have to try to create as much versatility for him as possible, [but] he'll probably come with us at this point."That may be true and congrats to Evans for working his butt off to make the team. But, Evans would likely be the first player sent down once the Mets add on Livan Hernandez as the fifth starter.
The team likely won't need Hernandez until a few games into the season the way the schedule is laid out, so he probably won't be on the Opening Day roster. Evans will be, and will stay with the team for the first handful of games. After that, it will be Hernandez's spot on the roster and Evans will likely head down to Triple-A Buffalo.