Several teams are in position to separate from a crowded pack atop the MLB standings. These trades would help. Rays SP Chris Archer to Cubs: Chicago's rotation ranks 23rd with a rough 4.62 ERA. Archer is under team control through '21 and would fill a void. Rangers SP Yu Darvish to Yankees: New York's rotation is overachieving (minus Sabathia) but can't bank on that lasting all season. White Sox SP Jose Quintana to Astros: This makes more sense than ever. Houston has established itself as the AL West frontrunner but needs a strong complement to Dallas Keuchel. Royals CF Lorenzo Cain to Nationals: Cain can adequately replace the injured Adam Eaton offensively and is even better in the field.