Nothing is decided at first base for the Yankees as Luke Voit and Greg Bird continue to battle it out a couple of weeks into spring training.General manager Brian Cashman weighed in on the competition Thursday during an interview with WFAN. “We feel like we haven’t had a chance to see the real Bird yet because of injuries. Last year he came in a lot leaner, but he put weight back on. He’s a good 25 pounds stronger. And he looks like the potential Bird that we’ve always believed,” Cashman said. “People probably forget turning the clock back that he was the most accomplished hitter in our system (a few years ago).”If you asked me who was our best hitter, it was going to come down to between Gary Sanchez or Bird. And then people kind of forget right now because Bird hasn’t been Bird because we think injuries.” “My gut is we’re not carrying both Bird and Voit on the club,” Cashman told WFAN, via the NY Daily News.He continued: “They’re fighting it out now. I believe that only one will be on (the roster), but it doesn’t mean I’m right there. It means we had time to play this out with (utility infielder) DJ (LeMahieu) and with one of those two guys, that’s probably the way we play it.”Bird and Voit have both been good so far this spring, posting batting averages of .389 and .286, respectively. But, Bird struggled mightily last season and Voit played well enough to earn at-bats in the middle of the team’s lineup in the postseason, so one would think the latter has the leg up on the job.“He did an amazing job,” Cashman said of Voit. “It was an incredible story and good for him and I loved the passion and the personality and all that stuff. And so there’s no reason to think, including what we’ve seen this spring, that he’s not an everyday guy.”As for Bird, Cashman is far from giving up on the 6-foot-4 lefty.