A funny thing happened for the Mariners on the way to a rebuild: They ended up as the best team in baseball—for now. With a come-from-behind victory on Thursday that finished a four-game sweep of the Royals, Seattle—yes, Seattle—has a six-game win streak, the majors’ top record at 13–2, and a four-game lead on Houston in the AL West. Not only that, but the M’s also boast the game’s most powerful offense: Through 15 games, they’ve blasted 36 homers and have a run differential of plus-42. The result is the best start for a team since last year’s Red Sox, who won 108 games and the World Series.