Having signed DH Carlos Beltrán and outfielder Josh Reddick and traded for catcher Brian McCann during the off-season, the Astros have sharply increased their team age and accelerated their timeline for winning. Even with that, though, they're short one piece-a frontline starting pitcher. Dallas Keuchel may have won the 2015 AL Cy Young Award but his performance in 2016 was a reminder of his limitations, while Lance McCullers has never thrown more than 160 innings in a season. To hold off the Rangers and the Mariners in the AL West, Houston must spend more prospect depth-righty Francis Martes or outfielder Kyle Tucker-on a top-end hurler. The Braves' Julio Teheran would be the perfect fit.