Simply put, the Cubs have needed bullpen help, probably as much as any team in baseball, especially given the difficulties of playing in the most difficult division in baseball this year.
The Twins had one of the better offseasons in the American League, and now they're having the second best regular season. The real question is whether they will be able to continue winning at this rate.
The Indians are far from out of the running, but their offense has been entirely offensive to watch. There were plenty of ways to prevent this situation from happening, they just would have been too expensive.
The Yankees have endured an ungodly number of injuries to start 2019. How have they done it? By actually being ready for it, and then by getting a little lucky.
Teams are leveraging the fact that free agency isn't working in the favor of players due to the aging curve and signing the best players to extensions that will only pay them for their prime years.