The New York Yankees are catching fire , having swept the Kansas City Royals and Boston Red Sox before opening their road series against the Houston Astros with Friday's 12-4 win. The American League leaders are firmly back in the World Series conversation as they show no signs of taking their foot off the gas pedal, making it interesting to see how long the Yankees can extend their momentum. Even the best things in life can be improved, though, and the Bronx Bombers aren't an exception. The Yankees could benefit from upgrading various areas , such as the bullpen and catcher, before getting into the thick of the season, and one way they can do that is by trading one of their starting pitchers. New York's starting rotation is performing like the best in baseball, boasting an MLB-best 2.61 ERA as of Saturday morning. With Carlos Rodón and Gerrit Cole's returns looming, someone will have to exit the mix .…