The Texas Rangers are having trouble staying above .500 heading into their road trip to Detroit and New York. Could a trade help? In most seasons, the MLB trade deadline is when everything heats up. By then, teams have a good read on whether they’re contenders or pretenders. The two weeks leading up to the deadline is usually the hottest time each season for deals. The Rangers made their major moves right around the deadline. But, at least one president of baseball operations is telling reporters that he’s already getting calls — and it’s not quite May. That could impact how the Rangers and the rest of baseball look at when to trade this season. Will Rangers Look to Deal Early? Philadelphia Phillies General Manager Dave Dombrowski. | Gregory Fisher-Imagn Images MLB Network’s Jon Morosi reported on Wednesday about a conversation he had with Phillies president of baseball operations Dave Dombrowski.…