Clayton Kershaw, Trevor Bauer, Walker Buehler, Julio Urias, Dustin May
Last year the Dodgers had the number 1 Team ERA (3.02) and they went out and got the defending NL CY Young winner (Trevor Bauer) to add to their already stacked rotation.
Max Scherzer, Stephen Strasburg, Patrick Corbin, Joe Ross, Jon Lester
Yes, this rotation is very old, Joe Ross is the only player under 30 years old (27), but the addition of Jon Lester makes them a top rotation. 1-5 they have more experience than arguably any team.
Yu Darvish, Blake Snell, Dinelson Lamet, Joe Musgrove, Chris Paddack
Off-season additions of Darvish and Snell transformed their rotation. The Padres are hyped up for this season, but they will need production from the back end of their rotation this year (which is a lot better with their offseason additions).
Jacob deGrom, Carlos Carrasco, Marcus Stroman, Taijuan Walker, David Peterson.
The Mets have the best pitcher in the league (deGrom) and added Carrasco and Walker which help to solidify a top-5 rotation. Syndergaard is projected to return in June and that will move the Mets higher up on this list.
Gerrit Cole, Corey Kluber, Jameson Taillon, Jordan Montgomery, Domingo Herman.
Their rotation is very top heavy, but their 1-2 punch is as good as any in the league. The additions of Kluber and Taillon are massive improvements over last years rotation. They are the only AL team to make the Top-5 and are favorites to win the AL pennant.
Honorable mentions: Rays, Cardinals, Braves, Blue Jays